Introduction and purpose of the IDE
MPIDE (Multi-Platform Integrated Development Environment) is an Arduino-like project of chipKIT™, which allows you to reprogram the board with different custom sketches. The IDE can be downloaded from the official site of chipKIT™: http://chipkit.net/started/
As a difference of the other similar IDEs (like Arduino, Maple, Pinguino etc.) this one gives you the opportunity to work with different kind of microcontrollers.