PacStats is able to analyze the log and the lib directory of the ArchLinux package manager (pacman) and generate statistical charts.
ctioga2 is a command-line plotting utility. It
enables users to make publication-quality plots of
data and mathematical functions quickly. It is a complete rewrite of the old ctioga, and is much more flexible, with quite a few additional features.
A key logger.
Broadcasts commands over SSH to multiple hosts.