Proof of a particular case of the Pythagorean theorem reproduced from a Book written by Abraham Bar Hiyya
in Barcelona 900 years ago.
Catalan Wikipedia meeting in Berlin organized while stranded due to the Icelandic volcano's ash. I am the one with the white hair.
Wikipedia is my hobby. The idea of free knowledge enthusiasms me because we are performing a fun activity while contributing to build a work that has value for humankind.
It seems to me that this paradigm breaks the classical outlines of economy where you dedicate a part of your time to do things for the others in exchange for money in a stressful environment and another part of your time to consume things using this money. I think that if there were more and more people dedicating to the projects part of their time the world would be a bit better and the people would live a bit happier.
My participation to the projects 
My participation here at meta 
Contribution to the definition of the movement 
Fund raising campaigns 
Project promotion and miscelaneous 
Participation at Wikimania