The program arbtt, the automatic rule-based time tracker, allows you to investigate how you spend your time, without having to manually specify what you are doing. arbtt records which windows are open and active, and provides you with a powerful rule-based language to afterwards categorize your work.
zpub is a server to collaboratively work on DocBook-based documentation. Editors modify the XML sources with their preferred editor and submit their changes via Subversion. zpub renders the files centrally to various output formats, optionally notifies other editors, provides an archive of all previous revisions of the document, and supports a simple sign-off workflow. The documentation and user interface is currently only available in German.
Screen Message displays a given multi-line message as large as possible, fullscreen and black on white. You can specify the text when launching sm, or edit it while the program is running. It is useful to send messages across a room (e.g., during a university lecture). For fast startup, it is recommended that you bind it to a key in your Desktop Environment.