MariaMole is an advanced IDE for Arduino developers. Features like color-themes, fully-configurable building process, multi-project workspace, etc, are available
This project is distributed under the license CC-By SA 3.0.
This project uses an open-source library called Scintilla, for the syntax-highlighting code editor. You can get Scintilla licensing from here: http://www.scintilla.org/License.txt
no trouble to install and run, works nicely.
Simple. Useful. Light.