Crimson Editor

Located at http://www.crimsoneditor.com is one of my favorite editors for, well, just about anything. It is smart, it is lightweight, and best of all it is FREE!!!

Crimson Editor offers:

• Syntax Highlighting for HTML, C/C++, Perl, Java, Matlab and LaTeX. Also, it can be extended for other programming languages based on custom syntax files.
• Multi-level undo / redo - all editing actions are recorded from the opening of a file. - any document always can be undone to it's initial contents. - unlimited undo and redo buffers.
• Project management - manage group of related files into one project. - remote files also can be included in a project.Directory tree view window - click to open documents. - filter to display only selected file class.
• and more, a complete list can be seen on their website.

The program is small enough to fit on a floppy disk yet powerful enough to be the only editor you may ever need! One negative is that it is not visual based, you have to enter your code but you can set up the program to have special commands run on your code (like compile and run) which can make your job easier.

I've always liked Crimson Editor and it does a great job with Java and HTML. I cannot speak to the other languages but I am sure it is just as great when you are working with them.