In brief, some (usefull?) links

Logiciels

Here are some (free as in speech, free as in beer, or not) softwares I use and like.
 BibDesk: BibTeX front-end very well design. For Mac OS X
 Adium a free Instant Messaging application (for Mac OS X) that can connect to AIM, MSN, Jabber, Yahoo, ...
 Beamer: a LaTeX package to build nice slides.
 TextWrangler: a free (as in beer, not as in speech) text editor that has all the fonctionalities I need (ok.. sometimes I am using vi)
 SSHTunnelManager: a front-end for the ssh command when used to open tunnels between two hosts.

Development
 

Python is for the moment my favorite programming language! Batteries included! It has everything! And the language is so clear, so natural. Reading programs is like reading algorithms, and I like this!
 and WingIDE is a very good IDE for Python (they can offer free license for open-source projects)
 StackOverflow is also a good place where I like to go, to ask questions and sometime to answer some...

Music

Some bands (ecclectic and limited choice)
 Godspeed You! Black Emperor, Mogwai, Mono, ...
 Klaktonclown : french band (from Nantes) "cabaret électrique"
 And some other french song bands Debout Sur Le Zinc, Les Ogres de Barback, Sabayo, Mansfield Tya, ...

and some specialized sites:
 http://xsilence.net : a webzine about independant rock
 http://archive.org : a lot of live concerts, freely downloadable (MP3 or other encodings)

Divers

Some usefull (or not) various sites :
 Les Aventuriers du Rail : online (and free) version of the famous game Ticket to Ride. A mustplay !!
 Marmiton : dhere I found a lot of delicious cooking recipes