Across Lite is a program for solving crossword puzzles online.
cardwords is a customizable crossword game. It uses cards showing characters and points. The players place their cards on the card-table so that they form crosswords.
A GNOME game to let you try to solve crossword puzzles. It aims for simplicity in use.
CrosswordPuzzle is a crossword puzzle game and editor. It's used to play or create crossword puzzles like those appearing in north American news papers. It was inspired by the movie "Wordplay", directed by Patrick Creadon and featuring the New York Times crossword puzzle editor Will Shortz.
Diagnil is a GUI application to help solvers of diagramless crossword puzzles. It accommodates puzzles distributed in print form as well as those distributed electronically using the Across Lite file format.
Einstein puzzle is a cross-platform open source remake of an old DOS game Sherlock, which was inspired by Albert Einstein's puzzle.
gmbCrossword is an application for making swedish typ crosswords. It is written in Gambas and has support for word lookup in databases. The main language is english but it's translated to swedish using the built in gambas translation system.
Klest-crossword is open source software for creating crossword puzzles. Read more
KrossWordPlayer is a KDE 3.x program to play AcrossLite (.puz) crossword puzzles.
Picmi (was Tux Picross) is a clone of Nintendo's Picross (aka Logic) series, it's written in C/SDL and is freely distributable through the GNU/GPL.
xword is a crossword puzzle application for UNIX/X that allows users to open and solve AcrossLite puzzle format files (such as The New York Times and The Washington Post).