Glt is a library of C++ classes and routines for programming interactive 3D graphics with OpenGL. The aim of Glt is to augment the OpenGL API with convenient mechanisms for manipulating the OpenGL state machine. Glt is a work in progress, and by no means covers the entire OpenGL specification. However, it already includes several useful classes and is designed so that additional classes can be added easily. In addition to Glt, the GlutMaster classes provide C++ wrappers for the GLUT API.
kmamu is a shell script which installs X icons for xmame into a folder on your KDE1 or KDE2/3 desktop. (These icons can be downloaded from the homepage.) When installed, each icon has a long description name as provided by xmame -listgames, and when clicked it will launch xmame with the appropriate game. Although the install script is specific for KDE, the icons are stored in X pixmap format and can be used with any window manager.
PLIB is a set of libraries to write games and other realtime interactive applications that are 100% portable across a wide range of hardware and operating systems. It's used by Majik3D, FlightGear, and others, and includes libraries for GUI widgets, sound replay, geometry, scene graph, joystick, and fonts/text.
PPM is yet another Game Boy (Color) tile and map editor that uses GTK. It supports many export formats (raw binary, GBDK .c, ISAS .asm, TASM .asm, WLA .asm, and RGBDS .asm), and has different Game Boy Color color emulation modes. It can also import GBTD and GBMB (popular tile and map editors for Windows) files. All mouse buttons draw, and there are loads of keyboard shortcuts. It can also optionally emulate the Game Boy's display.
Teddy is an OpenGL-based 3D graphics library written in C++. Its main features are simple scene graph and windowing system-enabling multiple cameras, camera windows, and scenes. It focuses on easy and flexible manipulation of models and model materials in the scene graph. It contains a number of primitive objects like sphere, box, and cone, and it can load LightWave object and scene files.
vetetris is a game written in Java. It's similar to tetris, but it is played in 3D. There are figures which are falling that have to be placed in the right manner. You can rotate the blocks in six different directions and move them in five directions. As time goes on they move faster and faster, and it gets harder to put them in the right spot.
"Explosions" is a simple SDL-based demo written in C which displays a faux-3D environment with small sprites. Using the mouse, you can cause little sparks (or fireworks) to appear. Using the keyboard, you can change the angle of viewing. You can also toggle a number of nifty effects, like blur, fade, dissolve, rotation and zoom. The C source-code is fully commented, and should be useful for learning some simple SDL and interesting effects code.