Beyond Compare - Beyond Compare allows you to compare files and folders.
PublicEmails - Publish blog posts just by sending an email
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Wordable.io - Import blog posts from Google Docs to WordPress in one click
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Diffbot - Get data from web pages automatically