Conkeror is a highly-programmable web browser based on Mozilla's rendering engine Gecko which is the base of all Mozilla products including Firefox. Conkeror has a sophisticated keyboard system for running commands and interacting with web page content, modelled after Emacs and Lynx. It is self-documenting and extensible with JavaScript.

Postfix is Wietse Venema's mail transport agent that started life as an alternative to the widely-used Sendmail program. Postfix attempts to be fast, easy to administer, and secure, while at the same time being sendmail compatible enough to not upset existing users. Thus, the outside has a sendmail-ish flavor, but the inside is completely different.

JACK Bitmeter is a diagnosis tool for JACK audio software. As its name might suggest, the bitmeter operates at the bare metal of JACK's I/O layer, looking at the 32 binary digits in each individual sample.

The Apache HTTP Server Project's goal is to build a secure, efficient and extensible HTTP server as standards-compliant open source software. The result has long been the number one web server on the Internet.

mhWaveEdit is a graphical program for editing sound files. It is intended to be user-friendly and robust. It does not require a fast computer.