Forge has more than 3,000 cards and allows to you play the trading card game Magic: The Gathering against the computer with rules enforcement. Other formats include drafting, sealed deck, and the "quest mode" where you start with a basic deck and you win more cards. The AI and user interface are basic but usable.
TrueSculpt lets you sculpt a 3D virtual clay ball by pushing and pulling it with your fingers. Many different tools are available for easy modeling: draw, grab, smooth, flatten, paint, symmetry, etc. TrueSculpt features undo/redo and the standard ".obj" save format. You can zoom and pan with two fingers.
PalindromicPrimeFinder is a little "toy" program that can find relatively big (e.g. 1000-2000 digits) palindromic probable prime (PRP) numbers. It generates random palindromic numbers and tests them for primality using a probabilistic algorithm. It is multi-threaded and stops after a certain timeout (if no palindromic primes are found).
BeagleSNES is a complete filesystem image which turns the ARM-based BeagleBoard-xM and BeagleBone Black platforms into an embedded appliance capable of playing Super Nintendo game titles. It uses a modified version of the SDL port of SNES9X as its emulator, boots into a GUI frontend for selecting game titles, and uses USB gamepads as the controllers. Most titles run quite well on the platform, though some performance-intensive titles and titles which use special hardware (such as titles which use the SuperFX chip) will run too slowly to be playable. Individual BeagleSNES components (bootloader, kernel, GUI/emulator) have been broken out of the filesystem image in order to allow interested developers to examine them without having to examine the full filesystem image. Full filesystem images, as well as images containing only the BeagleSNES binary and data files, are available.