Ramen is a free node based video compositor, It works in full HDR color precision. Ramen is being developed and tested on Linux (ubuntu 8.10) and Mac OSX.

calibre is meant to be a complete e-library solution and thus includes library management, format conversion, news feeds to ebook conversion, as well as e-book reader sync features and an integrated e-book viewer.

a graphics coding app similar to Processing, but using Lua (windoze only)

free lightweight webserver, supporting python & ruby, great for small web-based projects

more fire for the pc vs. mac debacle - some great points here; totally echoes my thoughts on the matter, but explained in an excellent, fun and non-geeky way

apple hating (and any OS hating) is always a refreshing sight

yay for OS wars: "OS X antialiasing, especially, it seems, with the monospaced fonts, just isn't as good as Windows ClearType."

FileHamster provides real-time backup and archiving of your files while you work. It enables you to monitor specific files on your hard drive and automatically create incremental backups whenever those files are modified.

FreeFrame is the open-source cross-platform real-time video effects plugin system designed for use in VJing applications (with bindings for Max, PD, vvvv, AfterFX et al)

Operating system vendors are forced to constantly patch their software to keep consumers protected from the latest digital threats. But which operating systems are the most secure?

OSX on x86!

ScatterChat is a secure instant messaging client designed for non-technical users who require secure and anonymous communications. Our typical end-users include human rights and democracy advocates operating in hostile territory.