IDE / Dev tools
Labs » Arduino Tool That Connects Each Board to Its Own Source If you create something with Arduino and put it out into the world, there is no well-established link to the source.
ArduGate | Develop with Arduino
Eclipse is a free, powerful, and full-featured development environment that can be set up to work with AVR and Arduino. This page is very much a work-in-progress, please feel free to add to it or improve it. This page explains how to setup Eclipse with WinAVR and the Eclipse plugin AVR-eclipse. playground - Eclipse
WinAVR : AVR-GCC for Windows
Graphical programming with the Arduino IDE