Diagnil is a GUI application to help solvers of diagramless crossword puzzles. It accommodates puzzles distributed electronically using several file formats (puz, jpz, xpf, and ipuz) as well as those distributed in print form. Although software for conventional crosswords has existed for years, the diagramless variant has received little attention. Diagnil attempts to fill that void. It lets you solve puzzles by entering words, placing them on a grid, and moving them around the screen until the final shape is achieved.
Memoria is a version of the traditional game of memory. It was developed using OnBoardC. It supports one to four players, the ability to play with 16, 36, or 56 cards, 160 different images for the cards, a high score table (by moves and time), and English, Spanish, Portuguese, German, Catalan, French, and Italian translations. It allows you to play via JogDial, Rocker, or Navigator buttons, and it is compatible with monochromatic, grayscale, and color screens.
Superficially, Dominoes on Acid is a solitaire variant of Dominoes with weird colorful tiles (and this view is enough to play the game). But on a deeper level it is a GUI for natural deduction. Every completed domino is equivalent to a proof of a tautology in classical propositional logic. The game can be played online as an applet or offline as an application. It is built on a simple isometric engine that can be used independent of the game.
YasSS (Yet another (simple|stupid) Sudoku Solver) is a Sudoku solver for the command line. It solves any Sudoku puzzle and generates Sudoku puzzles. It can calculate the number of solutions, print a difficulty rating, and generate a canonical form for a puzzle. It also provides a curses interface for playing Sudoku.