Dage is free for non-commercial use but not open source. Features: 3D OpenGL render engine supporting hardware acceleration; Powerful scripting with Lua;Character animations;Characters can walk around and say things;Collision detection;Dynamic shadow casting;Support for 3DS with lightmapping;Texture support: BMP, JPG, TGA, PNG;Room and mesh model ;Support: 3DS, OBJ;Actor animation model: SMD (Half Life), MD2 (Quake 2);GUI creation, ;Looking at objects classic style;Picking up objects;Easy to use inventory;Room Animations with animated 3D sprites; Cutscenes...more!