Beyond Compare - Beyond Compare allows you to compare files and folders.
OpenID - OpenID is a safe, faster and easier way to log in to web sites.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Portier - An email-based, passwordless authentication service that you can host yourself.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
OAuth - OAuth is an open standard for authorization. It allows users to share their private resources (e.g.