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.

Routino is an application for finding a route between two points using the dataset of topographical information collected by OpenStreetMap

Pidgin-microblog is a collection of plugins for Pidgin or any other libpurple based client like Adium or Finch. It implements microbloging systems to Pidgin. Currently it supports Twitter, Identi.ca, and Status.net (old Laconi.ca) based servers through the conversation windows.