LanguageTool is an open-source proofreading tool that supports traditional checks associated with grammar checkers but goes far beyond that to check style and frequent language misuse. It supports over 20 languages, and more are in development. LanguageTool is integrated into multiple environments, including OpenOffice.org, vim, OmegaT, and LyX.

The code repo for GSoC will be at http://code.google.com/p/google-summer-of-code-2011-languagetool/. Everything piece of code is also available at sourceforge.