Hammerhead is a stress testing tool for Web sites. It initiates connections from multiple IP aliases and simulates a user from each alias. It is fully configurable, and there are numerous other options for creating problems with a site. Extensive data collection is also available.
SLOCCount is a suite of programs for counting physical source lines of code (SLOC) in possibly large software systems. It can count physical SLOC for a wide number of languages. It can take a large set of files and automatically categorize their types using a number of different heuristics, and also comes with analysis tools.
Clint is a test bed for static source code checking, designed to check C++. It is designed to detect common programming errors and warn the programmer about these errors. It can warn you about errors or potential problems like header files not being protected. It is very extendible and has a Python plugin so you can write rules in Python.
QtUnit is a unit testing framework for C++ which compiles into a shared library. It uses the Qt library for platform independence. Tests can be compiled into modules which are automatically reloaded after modification. The text and graphical testrunners are fully localized and integrate perfectly into IDEs for the display of the exact source location where failures occurred.
Do178Builder is a documentation tool used throughout the software/hardware development effort, helping to produce the DO-178B/254 documentation much less painfully. A major obstacle to creating airborne products, for smaller developers, is the necessity to qualify the software per RTCA/DO-178B, or hardware per RTCA/DO-254. Without this qualification, airborne products cannot be deployed.