Open Source Productivity Applications

Mathematics

• FreeMat - A numerical analysis software with Matlab interface and more (Mac OS, Windows, Linux).
• Maxima - A computer algebra system (CAS) with Maple/Mathematica like interface (Windows, Linux)

Web Development

• Kompozer - An easy web authoring suite (Windows, Linux, Mac)

Graphics

• GIMP - An image manipulation application

Databases

• abRef - A multi-platform bibliography database management application