Cos that line just isn't nearly long enough.

Eclipse SDK - this is where I do the majority of my Java programming. Its auto-complete features aren't brain-dead, and its default code style setting is tolerable as well.

NetBeans - I use this for one reason, and one reason only: Matisse. Matisse is a rather convenient WYSIWYG java.swing GUI designer. Anyone who has ever used java.swing can relate the depths of hell using swing can be.

Vim - Vi Improved. Vim is an extension on Vi, a screen-oriented text editor. Its a modal editor, so there is no interface to speak of - everything is done by commands. It isn't an intuitive program, but once you have a good feel for it, it's a real effort-saver.

GCC - GNU Compiler Collection. Compiles damn near everything I do.

GTK+ - GIMP Toolkit. Toolkit for creating Graphic User Interfaces not using java.