ObDev's open source AVR tool chain is now called CrossPack for AVR® Development.
Renamed project to CrossPack due to trademark issues.
You can find it at http://www.obdev.at/products/crosspack/index.html
I thought I'd better update this project with some old news from 2008 as the webpage is no longer up.
[From ddd7 @ http://www.digithink.com/OSX-AVR/Introduction\]
OSX-AVR was a project I started 3 years ago to bring together the open source tool chain for the AVR micro-controller family into one easy to install package (for Apple computers). This was an attempt to provide an OS X version of the windows orientated WinAVR project (winavr.sf.net). It was also a reaction to how slow the community continues to be to integrate new devices into the most common software repositories for OSX in particular.... read more