Gel Free Java IDE

http://www.gexperts.com/gel.html

Gel is a Java IDE that is written in a language other then Java and is natively compiled for Windows. Unlike other Java IDEs available, this enables Gel to be very small and very quick. It works great on suboptimal hardware and consumes little memory.

This small size does not come at the expense of features however. Gel has all of the features you would expect in an IDE including syntax highlighting, code completion, parameter hints, smart project management and more. You can have the best of both worlds, great features, small size and fast performance.