BFBTester is good for doing quick, proactive security checks of binary programs. BFBTester will perform checks of single and multiple argument command line overflows and environment variable overflows. It can also watch for tempfile creation activity to alert the user of any programs using unsafe tempfile names.
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.
The Open Hardware Certification Program (OHCP) Test Suite is a collection of tests to verify the compatibility of your hardware with Open Source operating systems. Tests have been contributed by multiple authors and organizations, and are bundled with documentation, test procedures, and some automation scripts to help run the tests.
pftp allows you to send and receive files and directories recursively, send and receive standard input and ouput, filter your connection, set the net buffer size, set the bandwidth, send UDP datagrams unicasted, broadcasted, and multicasted (which is meant for AUDIO and VIDEO streaming), send data to another user and manage that data, perform a network test based on either UDP or TCP, and use optimized buffers for your Gigabit Ethernet links. pftp can start from command line, as a daemon, or by inetd. All features are supported for IPv4 and IPv6.
Java Memory Profiler (JMP) uses the JVMPI interface to track objects and method times in the JVM (Java Virtual Machine). It uses a GTK+ interface to display statistics. The current instance count and the total amount of memory for each class is shown as is the total time spent in each method.
Jot is used to print out increasing, decreasing, random, or redundant data, usually numbers, one per line. It can be used to generate randomness fitting a certain pattern (eg, a random IP address) or number sequences (useful in shell programming). It is often distributed together with lam and rs, sometimes under the name bsd-utils.