For Microsoft Users
Programming Arduino is much easier with the power and intelligence of the [Microsoft Visual Studio Professional development system. Visual Studio offers a wealth of “code helper” tools some of which I will profile in this forum over the coming months. Normally, Visual Studio costs a lot of money but you can get a free copy legally from Microsoft by following these [instructions
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http://www.visualmicro.com/pics/Arduino … io2012.png
The image above shows the code for the [ArduPilot Mega board. It isn’t a great picture, I will try to do better next time 
However, you can see how a complex .pde or .ino file can be more easily navigated than the Arduino IDE.
100% compatible with the Arduino IDE and provides the same features such as Serial Tool, Compile and Upload.](ArduPilot Mega - Arduino Mega compatible UAV Controller - GPS-10294 - SparkFun Electronics)](Visual Studio for free for Arduino Development)](http://www.visualmicro.com)