Overview of calendar and scheduling software for Linux.

Mudballs was written with the goal of providing an easy to use system for loading1 Common Lisp code into your image in a reliable and predictable manner. If you are new to Common Lisp, think of it as the start of a CL equivalent to Perls CPAN or Ruby's RubyGem's.

Intriguing collection of examples demonstrating pictures created using PGF and TikZ tools.

Tools for processing of GPS track data.

Smith chart tool which runs in a Javascript-capable browser. The site also has tools for astronomical calculations, sun dials, etc. (in German)

FPGA programming in C.

Another page to search the digits of pi, up to 4e9.

Details about Leopards "Time Machine", which appears to be less sophisticated than Plan 9 venti.

Java program to factor large numbers. In addition to ECM, it detects algebraic factors for Cunningham numbers and can use the Self Initialising Quadratic Sieve algorithm.

9ne (pronounced "nine") is an online code editor based on Emacs (Copyright 2006 Rob Rohan). 9ne is a recursive acronym and joke, and means "9ne is not Emacs". 9ne's design goal is to provide an all purpose text editor similar to Emacs but web based.
On 2020-12-19, the original link http://robrohan.com/projects/9ne/ points to Rob Rohan's blog, so replaced it by a link to the github repository, which has been updated on 2008-05-06 and archived by the owner. It is now read-only.