L1/L5 coherently sampled TRIGR data files containing the L5 test transmission from SVN49.

SaVi - satellite constellation visualization. Simulate Iridium, Globalstar, Sirius, GPS, Teledesic and other systems, modify them, or design your own. Uses Tcl/Tk and Unix libraries; 3D viewing option requires Geomview running on X Window. BSD license.

There is a newer version of the BT747 GPS logger program.

Web site offers a CAPTCHA test to distinguish between humans and robots. The results are used to correct texts from old books which were scanned.

Blog entry describing the AutoIt scripting language for Windows.

Linux kernel patch to use RAM with defects on certain addresses.

Web calculator implemented in JavaScript. Implements arbitrary precision, plotting, prime testing, polynomial roots, matrix arithmetic and very limited (polynomials) symbolic integration. Written by Fabrice Bellard, who also wrote TinyCC, QEmacs, FFMPEG, QEMU and more: https://bellard.org/

Btrfs is a new copy on write filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration. Initially developed by Oracle, Btrfs is licensed under the GPL and open for contribution from anyone. As of 2009-03, it is still experimental, but it has been added to the Linux kernel 2.6.29.

Asynchronous, multi (40!) core Forth-bases processor with fast ADC and DAC interfaces, might be interesting for software radio applications.

Interesting essays about software design.