Maybe patforkin forgot about this thread, so I'll answer. I'm the maintainer of LanguageTool (languagetool.org). LanguageTool is a style and grammar checker, it could maybe be integrated into PSPad like a spell checker, so that it underlines wrong words and phrases. It's written in Java, but it also offers an HTTP API. Please let me know if you have any questions.
-- <http://forum.pspad.com/read.php?2,61769,61807> PSPad freeware editor http://www.pspad.com
