VisualBoyAdvance Link is a system and GUI that supports GBA/SP multiplayer link cable emulation and linking of up to 4 Gameboy emulators. It is a mix between VBALink and VBA-M. It has a "General Purpose" module that allows the Final Fantasy Tactics Advance game to be played in multiplayer mode, joystick support, display of an image representing a game after selecting a set, and game configuration saving.
Xjig Manager provides an easy way to launch Xjig, the jigsaw program. It allows you to preview images, set puzzle width, select piece size, swap mouse buttons, fix rotation angle to 90 degrees, set piece distortion, set shadow, set animation speed, and perform piece flipping and cropping. The 'no shuffle' option is good as a starter for younger children. It works with PNG, GIF, JPG, and BMP images. There is an image preview that can be seen as a floating picture while you solve the puzzle.
XorCurses is a game based entirely on Xor by Astral Software. The original game was released around 1987 for the 8-bit home computers popular at the time. XorCurses attempts to faithfully recreate that game for Linux, but slightly ironically, uses ASCII characters instead of pixel based graphics (which even the 8-bit computers could manage). The idea of Xor is to roam around a series of mazes collecting masks. The first level is simply a matter of finding your way around, but the second level introduces fish and chickens which block your path or kill you if they hit you. From there on in, things get progressively tougher and really is a challenging and difficult puzzle game.