In case this helps anyone....
These are all extensions available through the repository ordered by latest release date first, with any non-english descriptions of what they do Google-translated into English.
I've marked the translated ones as [GERMAN] and bad translation means Google didn't do a good job.

Cut and Paste for your own English Quick Glance offline list of what-is-what.
The page numbers will eventually be wrong, but are current in the Backend Extension Catalog as at 21 Sept 2009.
PAGE 1
[BackupDB] BackupDB Module ... Backup TYPOlight Database, Automatic Backup, Creating Website Templates
[BackupDBplus] BackupDatabase+ ... Backup Database with extended functions
[browser_update] Browser-Update ... This module provides an opportunity to inform your visitors about the fact that they should switch to a newer browser.[GERMAN]
[ch_flowplayer] chFlowPlayer ... Integration of Filmplayers FlowPlayer [GERMAN]
[dlh_googlemaps] Google Maps Module ... Integration of Google Maps as a module
[lastlogin] LastLogin and MembersOnline ... Display the "Last Login" time and "online members"
[summarizeFeeds] Summarize feeds ... Summarize several news archives or calendars in one RSS or Atom feed.
[zedseries_imex_installer] ZedSeries Im.Ex. client installer ... The installer for the Im.Ex. client
[static_tables] Statische Tabellen ... Creating tables with static content for display in the frontend [GERMAN]
[PiwikTrackingTag] Piwik tracking tag ... Includes the tracking code of the web analytics software Piwik into the frontend.
PAGE 2
[extended_checkbox] Extendet checkbox ... Checkbox with a hyperlink in the Label
[rootSiteConnect] rootSiteConnect ... Using TL starting point of cross-links allows the front end, eg in menus [GERMAN...bad translation]
[banner] Banner Advertisement Module ... A banner advertisement module with a simple form of weighting.
[yw_youtube] yw_youtube ... Provides a content element for youtube videos
[losungen] sanitary working ... Daily solution of the Moravian Church [GERMAN...bad translation]
[csseditor] CSS editor ... Use a source editor to edit CSS files generated by TYPOlight
[cm_membergooglemaps] Memberlist with Google Map ... Show members location in a Google Map
[original_theme] Original Backend Theme ... Original backend theme regenerated from TYPOlight 2.4
[Slideshow2] Slideshow2 .... A javascript gallery based on Mootools to presentate images
[trackback] Trackback ... Enables sending trackbacks
PAGE 3
[zedseries_lib] ZedSeries Library ... A set of php5 class to speed up module development
[glossarylinks] Glossary highlighting ... Through this module Typolight words from the glossary of selected pages are provided with a tooltip.[GERMAN]
[visitors] Visits and Hits Counter ... A counter module for hits and visits
[cm_searchplugin] Provide a browser search engine to your visitors ... Make a browser search engine to your website available
[easyupdate] easyUpdate ... Update your system from the backend.
[tensiderepository] TensideRepository ... Use the ExtensionRepository without the PHP SOAP module
[deluser] deluser ... Your user can delete your account form the frontend
[maintenance] Maintenance Module ... A simple way to set up a temporary redirect.[GERMAN]
[mooStack] MooStackgallery ... Integreate module or content element on basic MooTools Photo Gallery.[GERMAN]
[pageimage] Page image ... Set an image per page
PAGE 4
[countdown] CountDown ... Generates an insert tag for count down days to a specific date.
[newsticker] News Ticker ... Scrolling news items on your website
[PictureCaptcha] Picture Captcha ... Antispam. Attention is not barrier-free!
[feedlister] FeedLister ... The FeedLister modul allows you to collect feeds under a rubric. Every FeedList rubric can displayed on one or more pages.
[routenplaner] routenplaner ... The Route Module provides a form for entering the starting address and destination address for calculate the route. The data are
[xtmembers] Additional data fields for members ... Additional data fields for TYPOlight members
[Imageslider] Imageslider ... The next version of the imagerotator based on mootools 1.2
[monoslideshow] Monoslideshow ... Create galleries with Monoslideshow 2, one of the best commercial Flash slideshows.
[webShop] TYPOlight webShop ... CMS & WebShop in a system [GERMAN]
[autoGrowingTextarea] Auto growing textarea ... Grows textareas when needed.
PAGE 5
[ce-access] CE-Access ... Limit user access to content elements
[imageflow] ImageFlow Gallery... ImageFlow is a Javascript gallery using the well-known Cover Flow animation from iTunes.
[tags] Tags... Tags to categorize TYPOlight elements
[tags_articles] Tag Cloud Articles ... Tag Cloud for articles
[tags_events] Tag Cloud Events ... Tag Cloud for calendar events
[tags_news] Tag Cloud News ... Tag Cloud for news entries
[IPBBridge] Bridge to IPB Board of IP ... TypoLight opportunity to merge with the Invision Power Borad (IPB). [GERMAN]
[efg] EFG - Extended Form Generator ... Manage form data: confirmation email, data storage, list and edit in backend and frontend
[extendedTextfield] extendedTextfield ... Extended the simple text box (form) a picture and description.[GERMAN]
[zedseries_commenteverything] ZedSeries Comment Everything ... an improved version of comments module
PAGE 6
[yw_listbirthdays] yw_listbirthdays... This extension provides a FE module to display today's birthday children
[zedseries_listing] ZedSeries Listing ... an improved version of listing module
[tweakLinks] Tweak links ... Add you links depentend of their goal (external page or file download) a special class.
[chShop] chShop ordering ... In TL integrated ordering system without a fixed item management [GERMAN...bad translation]
[imageProtector] Image protection ... Protect your pictures from being copyied or saved.
[ajax] Ajax-Tools ... Simplier and faster usage of AJAX in TYPOlight.
[translation] Translation module ... For navigate easily between multilingual content and manage statuses of translation
[ext404] Extended 404 ... Extends Typolight with an module to show specific 404 error messages
[auto_completer] Auto Completer ... activate the ajax-keyword-sugestion as known from Google or Wikipedia
[mailusername] E-Mail Username ... Register/login users with their email address
PAGE 7
[quickpoll] QuickPoll... Create multiple quickpolls: create, vote, results, list
[formfieldset] Fieldset for Form generator ... Group fields in form generator in to fieldsets
[hit_graphical_navigation] Graphical navigation ... Mount a graphical navigation [GERMAN...bad translation]
[flashGal] flashGal ... flashGal flash gallery based on simpleviewer
[cacheicon] Cache-Icon ... Shows a special icon for each page if caching is enabled.
[helpmessage] Help Message on Forms ... Displays a help message for each form field.
[inputvar] External Variables ... Use GET and POST parameters as inserttags
[newstwitter] News Twitter ... Sends a status update to Twitter when you publish news.
[ce-tracking] ce-tracking ... Adds a new content element which can be used to set cookies.
[calendar_eventsattend] EventsAttend ... Create events with form registration booking.
PAGE 8
[formauto] FormAuto ... Automatic Form - auto-create table, storage, advanced form validation
[hcard] hCard ... hCard Microformat
[redirect] Redirect modules ... Redirect modules for ssl, non-ssl, member language and login
[cdn] Content Delivery Network ... Rewrite your website to fetch files from a content delivery network (eg. Amazon S3) for higher speed
[inserttags] Custom InsertTags ... Create InsertTags to replace content in front- or backend.
[fp_lngInsert] fp_lngInsert ... Insert language dependent text or other insert-tags
[newslanguage] Changelanguage for news items ... Allows visitors to switch between different languages of a news item.
[cleardefault] Clear Default Value ... Clear default value on focus in form generator
[inputcount] inputcount ... Counts the number of characters in backend fields
[tabcontrol] TabControl ContentElement ... Create tabs as ContentElement
PAGE 9
[coverpicture] Cover picture ... This extension adds a new front end module. Images (eg title images) can inherited or overwritten from side to underside.
[changelanguage] Change Language ... Allow the visitor to switch between different languages of a page.
[googlesitemap] Google Sitemap Extension ... Extends regular pages by additional settings and adds a checkbox for the initial pages.
[calendarfield] Calendar Field ... Frontend Text Field with Datepicker
[randompage] Random page ... Redirects the visitor to a random page.
[xNewsletterSender] Set newsletter sender ... Set the sender for a newsletter archive.
[ce_flash] Flash Content-Element ... Adds a content-element to insert a Flashmovie.
[moretags] MoreTags ... Extends inserttags - adds some more tags
[zedseries_languagemenu] ZedSeries Language Menu ... A change language menu extension
[formrte] TinyMCE for forms ... Use the TinyMCE rich text editor in the form generator.
PAGE 10
[survey_ce] Survey Tool ... Application to create questionnaires and run online surveys
[autolink] Automatic Links ... Replace tags on your website with a link.
[fancyupload] FancyUpload ... Upload multiple files with a progress bar
[linklist] Link Collection ... Store links in categories, log how often they have been visited
[securepasswords] Secure Passwords ... Require users and members to use uppercase, lowercase, numbers or special chars in passwords.
[tb_googlecalendar] Google Calendar ... Embed Google Calendar and configure TYPOlight [GERMAN]
[yamltools] YAML tools ... Some must-haves for YAML friends
[zz_etag] HTTP Etag-Support ... Sends HTTP Etag to better use the browser cache.
[fp_preSelectMenu] fp_preSelectMenu ... Preselection of an option of a Select menu by passing a parameter to the URL [GERMAN]
[wf_subdomainUrl] wf_subdomainUrl ... Generates a URL with Alias as Subdomain
PAGE 11
[helpdesk] Helpdesk ... General forum and help desk ticketing application
[recall] Recall ... Automatic login to the frontend
[SimpleBlog] SimpleBlog ... A very simple template to understand how to use news module as a blog
[pm] Private Messages ... Send/Receive private messages between members
[wf_extendedBreadcrumb] wf_extendedBreadcrumb ... Extended Breadcrumb Module
[avatar] Avatars ... Adds avatars for frontend members and for backend users
[cron] CRON Scheduler ... Automate batch processing by a time schedule
[dlstats] Download Statistics ... Counts the number of file downloads
[editarea] EditArea Code Editor ... A editor plugin for textareas for code editing with syntax-highlight and more
[pluginmp3] Plugin Mp3 ... A extension to show a audio file as module, content element or in the end of a news.
PAGE 12
[xls_export] Excel 95 writer ... PHP library to generate Microsoft Excel 95 files
[MultiTextWizard] MultiTextWizard ... A widget to add multiple text fields per row
[literature] Literature ... Add/edit literature references and create a list output
[tltraining] Tl-Training ... Training diary for TYPOlight [GERMAN]
[xtmembers_fieldeditor] Member field editor ... This extension allows you to create your own TYPOlight member fields
[nesiumplayer] nesium MP3 player ... Play MP3-files in an small flash player and use a javascript playlist
[sessionform] Session Form ... Create multi-step forms and confirmation pages with this extension.
[themp3_player] themp3_player ... Frontend MP3 Player as ContentElement and News element
[ecards] Ecards ... Allows your visitors to send e-cards
[last_events] Last Events ... This module lists the last events limited by time period and / or number.
PAGE 13
[backend_contentselector] Backend content selector ... Add a content selector for a given text field to offer already entered content
[keywords] Keywords ... Adds Keywords and Description to Meta-Tags
[newsgallery] News Gallery ... Adds a gallery option to each news item
[x_ck_associated_events] Associated Events ... Associate events to certain pages
[bahnonline] Bahn online ... This module will show you the Bahn.de arrival form.
[jw_imagerotator] JW Image Rotator ... This extension provides the flash-based JW Image Rotator
[conditionalforms] Show/hide form fields ... Show parts of a form when a checkbox is checked.
[conditionalselectmenu] Conditional Select-Menu ... The conditional select-menu displays entries depending on it's parent select menu.
[HochzeitWebsite] Wedding Website ... Creating and managing a wedding website [GERMAN]
[ArticlePagination] ArticlePagination ... Paginate articles [GERMAN]
PAGE 14
[backendfolder] Backend folder ... This extension enables the renaming of the backend folder without changing the core. [GERMAN]
[easydownload] easyDownload ... You can publish Files and Folders in a directory
[fastedit] Fast Edit ... Edit content in frontend (sort-of)
[randomarticle] Random Article ... Display a random article out of a specific page as module.
[WorkflowManager] Workflow Manager ... Define a workflow [GERMAN]
[ce_autoSlider] ce_autoSlider ... The auto slider allows multiple content items to slide automatically horizontally [GERMAN bad translation]
[folderurl] FolderURL ... Use Folder-like URLs in TYPOlight
[calendar_ical] iCal creator ... Create iCal files from your TYPOlight calendars or import iCal files into your TYPOlight calendars
[mootabs] mootabs ... mootabs javascript tab for typolight
[Wunschliste] Wishlist ... Creating and managing an online wish list [GERMAN]
PAGE 15
[tlyaml] Tl-Yaml ... Yaml-Integration for TYPOlight [GERMAN]
[downloadarchive] Downloadarchive ... An extension to provide several files for download
[versicherung] Affiliate Versicherung.net ... Incorporate the contents of the affiliate program of versicherung.net. [GERMAN]
[dashboard] Dashboard ... Show News/Informations to your backend users.
[dlh_reservationplan] Reservation plan ... Reservation plan for the calendar module.
[bookmarking] Social Bookmarking ... This content element contains one or more hyperlinks to bookmark the actual page on a social bookmarking web service
[oxygen_theme] Oxygen Backend Theme ... Backend theme, mostly based on the free Oxygen icons of David Vignoni.
[recommendation] Recommendation ... Creates a hyperlink to recommend the actual page via e-mail
[styleVis] styleVis ... Visualization for TYPOlight stylesheets
[textwizard] Text Wizard ... Enhanced list wizard widget
PAGE 16
[vcard] vCard ... vCard download for members
[xtmembers_school] Additional member fields for schools ... Additional member fields for schools (school grades, year of graduation)
[catalog] Catalog ... Define multiple catalogs, each with their own custom field types.
[catalog_ext] Catalog Extension ... Adds to Catalog: alias jumpTo, title searchindex, front-end filter, list, reader, featured, related and reference modules.
[gallery] Gallery ... Create groups of image galleries with list, single and viewer Modules, plus user comments!
[recaptcha] reCaptcha ... The extension replaces the default captchas with reCaptchas and adds a reCaptcha form field
[ticker] Ticker Module ... Ticker Module for TYPOlight
[formcheck] Javascript Input Validation ... Automatic input validation using Javascript
[xSitemap] ExtendedSitemap ... Hide pages from the sitempa module even if the option "Show hidden items" is set
[newsextend] News extension ... Extends the core-methods of dealing with news
PAGE 17
[calextend] Extended Calendar ... Extension of calendar/events with some small improvements.
[boxes] Content-Box ... Create content boxes and connect them to one or more pages.
[autoarticle] Auto-Article ... Automatically create an article in new pages
[gl_xing] XING Module ... An extension for adding XING banner as module, with categories.
[g2n_advnavigation] Advanced Navigation ... Allows to display articles in navigation.
[morelinks] MoreLinks ... Links for News, Events and FAQ-items
[calendar_period] Calendar period ... Display events between start and stop date.
[development] Developer tools ... Includes the extension creator and the missing labels module.
[dompdf] DOMPDF ... Use DOMPDF to export articles as PDF.
[newsorder] newslist ordered ... This extension provides a FE-module "newslist ordered" with alphabetical sorting of the news.
PAGE 18
[embed_file_content] Embed File Content ... Dynamically embed html fragment files from the file store.
[subcolumns] Subcolumns ... Subcolumns to seperate an article in several columns
[Contentslider] Contentslider ... The content slider extends the functionality of mootools in TYPOlight.
[exttypolight] Extended Typolight ... Extend Typolight with a rich Application interface
[BackendBackgroundWorker] Backend BackgroundWorker ... Tedious tasks piecemeal work off [GERMAN bad translation]
[mod_megazine] Megazine, PageFlip ... Megazine PageFlip for TYPOlight [GERMAN]
[simile-timeline] Simile Timeline ... Display events on a DHTML timeline.
[printlinks] Print links ... Generates a list of all links on the page to be printed.
[licensewidget] License-Field for extensions ... This field can show license to users which the can/must accept.
[s3] Amazon S3 ... Rewrite TYPOlight files to be loaded from Amazon S3 (or another online storage).
PAGE 19
[countryselect] Country select menu ... Country select menu for the form generator.
[rep_notifier] rep_notifier ... Keeping track of news on repository server
[TwitterReader] TwitterReader ... Twitter provide messages [GERMAN bad translation]
[YahooWeather] Yahoo! Weather ... Yahoo! Weather RSS information
[graphicalheadline] Graphical headlines ... Adds graphical text options to the headline select menu.
[gt-access] Visibility rights for graphical text elements ... Restrict visibility for graphical text elements to certain backend groups
[DevNotice] Developmental Notice ... Module to give a visual indicator you are on your developmental server.
[avatarsizer] Avatar sizer ... Add your own dimensions for an avatar
[mod_backlink] Back-link ... Back-Link as a module [GERMAN]
[bedownload] Backend Download Widget ... Backend widget for file downloads.
PAGE 20
[mod_toplink] Top-Link ... Top-Link as a module [GERMAN]
[php_script] PHP Script ... Run an arbitrary php script
[ce_rater] Rating Module ... AjaxStarRater
[translationhelper] TranslationHelper ... Check if you have everything translated
[StickyNotes] StickyNotes ... Show userbased notes and tasks in backend
[css_selector] CSS Selector ... Front-end module for additional stylesheets [GERMAN]
[mdc] Menüabhängiger content (MDC) ... generates a file name depending on the current navigation path [GERMAN]
[user_online] User Online ... Module to represent the actual number of visitors who are on the site. [GERMAN]
[httpbl] http:BL / HTTP Blacklist ... Block suspicious visitors based on the blacklist-data from projecthoneypot.org
[optional_rows] Optional rows ... Hides a layout-row if theres no article in it.
PAGE 21
[nav-access] Backend navigation access ... Limit backend users to only one backend module
[weatheronline] WeatherOnline ... Shows the weather with forecast for today and tomorrow. This module use a wetter.com service.
[newslettergroups] Newsletter Groups ... Limit newsletter sending to member groups
[readfromurl] Read from URL ... Reads the content from an URL (normal content, serialized array, xml-data) and assigns it to a template.
[Tell-A-Friend] Tell A Friend ... Allows you to add a Tell-A-Friend Form or a addthis.com button
[frontenduserimport] Frontend user import ... This module allows to omport user via CSV file. You can set user groups and newsletters to the imported users.
[htaccess] Manage Apache .htaccess files ... Simplifies to manage Apache .htaccess files within your TYPOlight installation.
[gravatar] Gravatar: Globally Recognized Avatar ... Enables TYPOlight to use the gravatar feature (www.gravatar.com)
[hovernav] Hover Navigation ... Displays submenu items on main navigation hover
[mootoolsnav] Mootools Navigation ... Shows submenu-items when you hover over the main menu item.
PAGE 22
[graphicalelements] graphicalelements ... Graphic elements for modules [GERMAN]
[activationreminder] Activation reminder ... Remind your members to activate their account.
[mltext] Multilingual Text Fields ... These widgets automatically display an input field for every root page language.
[PicasaWebAlbum] Picasa Web Album Module ... Integration of Picasa Web Album as a module
[taxonomy] Taxonomy ... Create hierarchies of taxonomy terms for Catalog Module. This is not a tagging system!
[webcam] Webcam Module ... Webcam Module (no Streaming Webcams)
[LinkExtender] LinkExtender ... Extend the linkinformations
[backend_tabletree] TableTree widget ... This widget allows you to select any table in a collapsible tree (like PageTree)
[ajaxrating] Star-Rating Widget using Ajax ... Developer widget for star rating functionality.
[AutoWatermark] AutoWatermark ... Automatically add watermarks to images in frontend
PAGE 23
[templateinfo] TemplateInfo ... Simply shows TemplateAreas
[passwordcheck] Password Check Widget ... This widget confirms your current password.
[graphicaltext] GraphicalText ... Render text into graphics
[smhcheck] Safe Mode Hack checking tool ... Advanced check tool for Safe Mode Hack (FTP layer for file access)
[module_richtext] RichText ... Create a frontendmodule and use the tinyMCE to input text
[clearlog] Clear System-Log ... Empty the System Log table in maintenance module.
[image_headline] Dynamic Image Replacement Integration ... Dynamically replaces any CSS elements with image-rendered fonts
[DefaultContent_Module] DefaultContent Module ... Displays content only if theres no article for the page in the configured column.
[mitgliederliste] Members List ... List is filtered by group members [GERMAN]
[imagerotator] Imagerotator module ... Attention: The follower of this module is called Imageslider. Please use this module instead.
PAGE 24
[newsletter_delete] Newsletter Recipient Delete ... CSV Delete button for Newsletter recipients
[Photoalbums] Photoalbums ... Create groups of photoalbums with list and album view
[Shoutcast] Shoutcast ... shows some basic informations from a shoutcast radiostation
[zz_bebreadcrumb] Backend Breadcrumb ... Display a breadcrumb of your current position in the backend.
[mailnotification] Mail Notification (Content Element) ... Notify when someone visits your page.
[sourceeditor] Source Editor ... Use a full-features source editor for editing templates and files.
[inserttag_image] Image Insert Tag ... This utility allows you to add images (with resizing) using an inserttag. Included in core of TL 2.6.2+ (no not install)
[MetaCreator] Metacreator ... Create the meta.txt with a backend module
[ce_jw_media] JW Media Player ... Extension to add video or audio to an article as a content element
[efgExcel] efgExcel ... Excel 2007 Extension for Extended Form Generator (EFG)
PAGE 25
[stoppress] stoppress ... shows a picture within a DHTML Popup window, which slides into the page
[DC_DynamicTable] Dynamic Table Driver ... Allows the creation of a dynamic table data container driver (support file)
[piwik_psi] Piwik Webstatistics ... Includes the Piwik webstatistic application into TYPOlight.
[formDesigner] Form designer ... A module to rework the design of a form without using a template
[unzip] Unzip Extension ... Adds unzip to the File Manager. Unzip selected or all files in zip file.
[geshi] GeSHi - General Syntax Highlighter ... Generate syntax hightlight in PHP for a wide range of computer languages
[backend_filterwiz] Filter Wizard Widget ... This widget provides support for orderable options and suboptions in checkbox and radio format.
[photoshow] Photo show ... The photo show is created to add a line of images inside a page
[parseCSV] ParseCSV ... ParseCSV is an easy to use PHP class to read and write CSV data properly.
[newsletter_export] Newsletter Recipient Export to CSV ... CSV Export button for Newsletters recipients
PAGE 26
[catalog_mailer] Catalog Mailer ... Send selected catalog items in a pre-defined mailer
[invitation] Invitation ... Group your designer invitations (e-vites) in groups for preview, bulk sending