AbiWord -- About.com -- Academic Earth -- Amplify -- Animoto -- Audacity -- Aviary -- Bing -- Blio -- Blogger -- Bloglines -- BusinessCard2 -- CiteULike -- Connotea -- CuePrompter -- Delicious -- Digg -- Dogpile -- Doodle -- Drupal -- Ecademy -- Facebook -- FaxZero -- Flickr -- Foursquare -- GIMP -- Google Analytics -- Google Books -- Google Docs -- Google Reader -- Google Sites -- HathiTrust -- Hulu -- Internet Archive -- iTunes U -- Jing -- Justin.tv -- Khan Academy -- LibGuides -- Library Success -- LibraryThing -- Library 2.0 -- Linkedln -- LISWiki -- LISZEN -- Livemocha -- Lulu -- MARC21 in Your Library -- Meebo -- Mikogo -- Moodle -- Movable Type -- Myspace -- Ning -- OpenID -- OpenOffice.org -- Orkut -- PBworks -- PDF-to-Word -- Photobucket -- Picasa -- Podcast Alley -- Prezi -- Project Gutenberg -- Qwika -- Readerjack.com -- Remember the Milk -- Rollyo -- Rondee -- Scour -- Second Life -- Shelfari -- Skype -- SlideShare -- SortFix -- Spybot-Search & Destroy -- StatCounter -- StumbleUpon -- SurveyMonkey -- Technorati -- Triplt -- Twitter -- TypeFaster -- Ustream -- Vimeo -- VuFind -- Widgets -- Wikipedia -- Wikis by Wetpaint -- Wolfram Alpha -- Wordle -- WordPress.com -- WorldCat.org -- XING -- Yahoo! Answers -- YouSendlt -- YouTube -- Zoho -- Zoomerang -- Zotero

1. Web sites -- Directories
2. Free computer software -- Computer network resources
3. Web 2.0
4. Libraries and the Internet