High-speed, 3D-friendly, TightVNC-compatible remote desktop software
Application for Mind Mapping, Knowledge and Project Management
Powerful desktop publishing software
Personal and small-business finance manager
Computer Algebra System written in Common Lisp
FlightGear Flight Simulator: free open-source multiplatform flight sim
A premier mind-mapping software written in Java
Open Source Monitoring System for performance and availability.
Nagios network monitoring software is enterprise server monitoring
An interactive viewer for three-dimensional chemical structures.
Scanning probe microscopy data visualisation and analysis
Document Management System and Content Management System
iDempiere. Community Powered Enterprise
Model Railway CAD program
Toolkit for working with and mapping geospatial data
End to end data integration and analytics platform
An integrated writing environment for creating LaTeX documents
The Free / Libre / Open Source Web App with the most built-in features