I'm a fan of Dungeons and Dragons 4.0, and being far too fanatical wrote a few tools that in my opinion improve the play experience.
The LaTeX .sty file listed below is for generating skill sheets that closely resemble those found in the book, the idea is that damage will be precalculated. It is currently a work in progress, and I do not guarentee forwards-compatability.
I also revised the character sheet to fit all of the important stuff on one page. It is not a form, for the only reason that I have no need of one. Inkscape is perfectly capable of editing PDFs, and provides all of the functionality I need.
The notes for the campaign I'm currently in.
Watch out!