Dwarf Therapist is an extension application for the fantastic game Dwarf Fortress. DF is a great game. And it's fun to manage dwarves with keyboard menus until about the 50th one shows up. If you're starting to get overwhelmed you need therapist in your life.
SystemTap provides free software (GPL) infrastructure to simplify the gathering of information about the running Linux system. This assists diagnosis of a performance or functional problem. SystemTap eliminates the need for the developer to go through the tedious and disruptive instrument
... [More], recompile, install, and reboot sequence that may be otherwise required to collect data.
SystemTap provides a simple command line interface and scripting language for writing instrumentation for a live running kernel and user-space applications. [Less]