Minbif aims to use the libpurple library from the Pidgin project to provide an IRC-friendly instant messaging client. It uses the libpurple library to support over 15 IM protocols.
WeIRCd is a robust, simple, and easy-to-use IRC daemon. Its built-in services make setting up Chanserv, Nickserv, and others very easy. The server supports runtime loaded modules and other modern features.
A Step 7 AWL/STL/PLC simulator.
An IDE for Python.