QCad is a powerful but easy to use 2D CAD program for Linux, Windows, and Mac OS X. It uses DXF as its standard file format. While other CAD packages are often rather complicated to use, QCad tries to stay comfortable, and even an absolute beginner can create professional drawings with a minimum of effort.
JDiveLog is a logbook for scuba diving. It manages all important dive data, as well as the pictures taken during the dive. Features include the ability to import UDCF data or data from Suunto, Uwatec, and HeinrichsWeikamp computers, profile generation, statistics, and a Web page generator.
Opticks Extras is a set of official extensions for the Opticks application. The Spectral Processing extension adds multi-spectral and hyper-spectral processing capability to Opticks. The IDL Scripting extension integrates an IDL interpreter directly into the Opticks application. The Python Scripting Extension integrates a Python interpreter directly into the Opticks application.