Blackvoxel is now completely free. The game is now released entirely under the GNU GPL v3 free software licence. This mean you can now get the game freely, source and executables.
We really appreciate this iniative of Blackvoxel‘s staff and if you like the game, we invite you to help them with a donation.
Download the game : http://www.blackvoxel.com/view.php?node=1541