webcheck is a website checking tool for webmasters. It crawls a given website and generates a number of reports in the form of html pages. It is easy to use and generates simple, clear and readable reports.

pslist is a simple utility to list the process IDs (PIDs) of a process and all its children, and its children's children, and so on. If invoked with a command name which ends in 'kill', it sends a signal to a selected group of processes. If invoked with a command name which ends in 'renice', it sets the nice level of the selected group of processes.

SpamOracle, a.k.a. "Saint Peter", is a tool to help detect and filter away "spam" (unsolicited commercial e-mail). It proceeds by statistical analysis of the words that appear in the e-mail, comparing the frequencies of words with those found in a user-provided corpus of known spam and known legitimate e-mail. The classification algorithm is based on Bayes' formula, and is described in Paul Graham's paper, A plan for spam.

PaX is a Linux kernel patch which adds much stricter control on how memory is being used by applications. A normal Linux kernel leaves the control to the application and does not implement any enforcement. Especially buffer overflow attacks benefit from the absence of kernel enforced memory control. PaX tries to do its best to enforce this control of memory used by applications, thereby making it harder to successfully exploit buffer overflows.