I received from Vittorio this kind of chain letter, so here's my answers.

Communicate: Skype, Gmail, Meebo (seldom), Ustream.tv chat, elgg.org
Search: GOOGLE, wikipedia
Rss Reader: Akregator, but not really lately.. just firefox active bookmarks
Bookmark: del.icio.us,scuttle
Stats: Firestats
Video and images: Youtube, Google Video, Flickr, Vimeo, ustream.tv
Music: Lastfm
Blog: Wordpress, DRUPAL!! :)

Wrapping it all up: Rssself! (selfmade... :D )

Now, it's up to theodor and Splunge, my server-mates!