GtkBalls is a simple but awesome logic game, where you try to remove as many balls from the game field as you can.
metromap is a simple program for finding paths in metro (subway) maps. Maps for Moscow, St. Petersburg, Kiev, London, and Berlin are included. Others can be downloaded from the pMetro Web site.
A .NET component for spreadsheet reporting without using Microsoft Excel.
A thumbnail generation library for Java with a fluent interface.