Google AuthSub or ClientLogin
API Mashups (14)
Automate Webmaster Tools reporting in Microsoft Excel without programming.
Web analytics, social interactions and SEO reports for all your sites in one place. Compare and analyze portfolios of web sites. Group them any way you like and view totals and averages.
Lyricat is a collaborative song lyrics translation wiki and search engine. Make a translation requests to the Lyricat community or contribute and earn reputation points.
Google is shutting down a number of deprecated APIs on April 20, including YouTube Data, OpenID, Webmaster Tools, Apps Admin, Documents List and ClientLogin.