nimsg (the Network Instant MeSsenGer) is a compact, server-based chat program. Its features include the ability to chat with more than one person at the same time, the ability to post multiple times in a row, and the ability to let users choose their in-chat nicknames. It can be used as an alternative for IRC, for those times where you just want to have a small, local chat room.
Bibulous is a drop-in BibTeX replacement based on style templates. It provides all of the functionality of BibTeX, while adding the ability to work with large-scale databases, multilingual data, localized sorting, and a lot more. Its outstanding feature is that users can define new bibliographic styles in a matter of minutes without mastering the details of any user guide and without needing to understand the underlying code. This is possible through the use of style templates, which are ideal structures for defining the format of a bibliography.