The majority of the code is written by me (Philipp Reisner), but fortunately there are a few out there who are helping.
I have put here some names in no particularry order, if you feel that you should be on this list, want to change your name :) or want to see some comment beside your name please write me an e-mail.
 | Philipp Reisner -- Author
|  | Lars-G. Ellenberg -- Co-Author
|  | David Krovich -- Debian packages maintainer
|  | Jan Niehusmann -- worked on the initial debian packages
|  | Ard van Breemen -- kernel hacking, initial debian packages
|  | Luis Claudio
|  | Fabio Olive Leite -- kernel hacking
|  | Thomas Mangin -- shell scripts
|  | Alan Robertson -- advice
|  | Thomas Stinner -- perl
|  | Sergio Talens-Oliag -- perl
|  | Marcelo Tosatti -- kernel hacking
|  | Clemens Reisner -- Typo3, Website
|  | Cyril Bouthors -- Debian packages co-maintainer
|  | Philipp Hug -- Debian packages co-maintainer |
I should also mention the Vienna university of technology, it's institute for computer languages and my faculty advisor Anton Ertl here. DRBD started as my diploma thesis at university. 
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