HGE - for 2d projects. http://hge.relishgames.com/overview.html
TV3D - for both http://www.truevision3d.com/
C4 Engine http://www.terathon.com/c4engine/index.php
But as far as I can see if it has 3d features then things will be a lot more complicated and be designed mainly for 3d projects (use HGE for a 2d project).
There are other graphics libs out there - but they have no sound or other features required for games production.
TV3D - for both http://www.truevision3d.com/
C4 Engine http://www.terathon.com/c4engine/index.php
But as far as I can see if it has 3d features then things will be a lot more complicated and be designed mainly for 3d projects (use HGE for a 2d project).
There are other graphics libs out there - but they have no sound or other features required for games production.