BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
SLOCCount is an easy-to-use tool that counts Source Lines of Code (SLOC). It auto-determines the language(s) (inc. C, C++, Ada, Assembly, shell, COBOL, C#, Fortran, Haskell, Java, LISP/Scheme, Perl, PHP, Python, Ruby, SQL). It also estimates cost & time.
This tiny project is a plugin for collectd (http://collectd.org/), which collects statistics from php5-pinba (http://pinba.org/). Now this project is collectd-based replacement for MySQL-based pinba-engine.
This is an opensource project for the calculation of the mathematical constant Pi. If you are a mathematician or programer please contribute ideas or code for this project. Non professionals are also welcome to contribute.
GL O.B.S. is based around a PyGTK interface that launches OpenGL programs feeding them with a common CLI options set which will affect their behaviour, then receives back their statistical output. Benchmarks are easy to create and add.
A simple command to convert calendar dates to julian dates. Quite useful in
timing situations where you need elapsed time between dates.
Also useful for astronomy applications.
UMark is a graphical interface that allows gamers to easily configure and run benchmarks on Unreal Tournament 200x. It supports "botmatch", "flyby", and "timedemo" benchmarks. You may save/load results, or submit them online.
PHP Profiler is both a Zend extension and module capable of generating profiling information (function call statistics) for PHP applications on the server side. No PHP code has to be changed, although the profiler data is available to your scripts.