One of the best space simulation is available also in a Linux version.
Thirty-two years have passed since the Great war. Terrans and Vasudans have formed a new alliance. But new threats are lurking around.
Real pdf editor. You can use either many already present script functions, or you can create your own, or you can use low level object tree with knowledge of pdf specification to do almost everything with your pdf.
Bugzilla is server software designed to help you manage software development. Features
* Optimized database structure for increased performance and scalability
* Excellent security to protect confidentiality
* Advanced query tool that can remember your searches
* Integrated email capabilities
* Editable user profiles and comprehensive email preferences
* Comprehensive permissions system
SymPy is a Python library for symbolic mathematics. It aims to become a full-featured computer algebra system (CAS) while keeping the code as simple as possible in order to be comprehensible and easily extensible. SymPy is written entirely in Python and does not require any external libraries.
RaVeR (See the Music!) is a sound animation program. It renders full screen 3D animations in synchronization of music or any kind of sound at realtime! It is open source, free, works in Linux using ALSA and OpenGL. (old SDL and SVGALib versions avail.)