Godot is an advanced, feature packed, multi-platform 2D and 3D game engine. It provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel.

EKG2 is an open source instant messenger program for UNIX systems. The program has a plugin-based structure, and supports multiple protocols, currently Jabber, ICQ, Gadu-Gadu, IRC, RivChat, PolChat, NNTP and RSS.

This gem provides a command line utility to turn images into ASCII art. It can be used as an executable which may be called from the terminal as well as a library so that it can be used in other programs.

FontForge is a font editor. Use it to create, edit and convert fonts in OpenType, TrueType, UFO, CID-keyed, Multiple Master, and many other formats.