Evergreen - ILS

Open source Integrated Library System

An open source ILS (integrated library system) used by over 1000 libraries around the world. The software, also called Evergreen, is used by libraries to provide their public catalog interface as well as to manage back-of-house operations such as circulation (checkouts and checkins), acquisition of library materials, and (particularly in the case of Evergreen) sharing resources among groups of libraries.

Kalzium

Kalzium describes itself as "your digital replacement for the periodic table on paper." It displays information from the periodic table in a variety of ways, and it offers a molecular weight calculator, 3D molecule editor, an equation solver for stoichiometric problems and more. (Note that in order to use Kalzium on Windows, you'll need KDE for Windows.)

Apache JMeter- Open Source Software testing Tool

Apache JMeter is a open source tool used for Load testing, through which it Analyses the performances of various Web applications. It can also be used as a Unit Testing tool.

OpenSTA - Open Source Software testing tool

OpenSTA is a open source Load testing software which performs scripted HTTP and HTTPS heavy load tests with performance measurements. OpenSTA currently runs only on Microsoft-Windows based operating systems.