This is a Super Simple Java Editor written entirely in Java. It allows you to compile and run java programs in an mdi interface with syntax highlighting and easy commenting. Currently in suspended development. Available as a jar and an msi.
HTML / CSS / JS / PHP/ ASP/ PERL / JAVA editor with syntax highlighting, split screen editing and other essential tools. Tag Explorer - an HTML and user resources storage. Ability to create and reuse code fragments.
DJ Java Decompiler is Windows 95/98/Me/NT/2K/XP/2003/Vista decompiler and disassembler for Java that reconstructs the original source code from the compiled binary CLASS files (for example Java applets).
Properties Editor (Java i18n tool) is the tool for Java products internationalization. The editor has easy interface and ability of working with languages, different from english. WYSIWYG. Not the secret that .
If you like PC games then you should know Irrlicht Engine, a multiplatform graphics engine (it works as much for Windows as for Linux and MacOS) totally written in C++, which produces 3D images, something needed in high quality games.