Thanks for those links !
I found another nice one : http://mankonit.free.fr/qbal/
Main functions are presents, and it's focused on simplicity. Bullet database is quite complete I think (I found the bullets I'm using ... Sierra and Hornady, not the most exotic OK !).
The price is nice too : 5$. The guy developping it also seems interested in adding new functionalities based on users feebacks.