Social Networking
www.wikipedia.org /// www.flickr.com /// www.fotocommunity.de /// www.xing.com /// www.facebook.com /// www.myspace.com /// http://www.linkedin.com /// www.last.fm /// www.youtube.com /// /// www.webnews.de /// www.myvideo.de /// www.sevenload.de /// www.secondlife.com /// www.qype.de /// /// www.fototouristen.de /// www.plazes.com /// www.43things.com /// www.clipfish.de /// www.videotomie.de /// www.newstube.de /// www.bloglines.com /// www.oneview.de /// www.deviantART.com /// www.dialo.de /// www.wooloo.org /// www.spoke.com ///

Social Bookmarking
del.icio.us /// www.technorati.com /// www.furl.net /// http://vi.sualize.us /// www.cxweb.de /// www.mister-wong.de /// http://twitter.com /// http://www.propeller.com /// http://slashdot.org /// http://www.diigo.com /// http://linkagogo.com

Blogsysteme
www.wordpress.de /// www.pageflakes.com /// www.bloggerforum.de /// www.typepad.com /// www.blogger.com /// www.livejournal.com /// www.netvibes.com

Organisation, Weboffice
www.zimbra.com /// http://basecamphq.com /// www.kiko.com /// http://numbler.com /// http://www.echosign.com /// www.thinkfree.com