openid
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KnowEm
Search over 590 popular social networks, over 150 domain names, and the entire USPTO Trademark Database to instantly secure your brand on the internet. KnowEm allows you to check for the use of your brand, product, personal name or username instantly on over 590 popular and emerging social media websites. Grab your name and secure your brand before someone else does.
Social network portability is one of several user-interface ideas and suggestions for working with microformats in the area of data-portability .
Microformats
Microformats
The microformats.org community recently celebrated its 5th birthday – five plus years of openly researching, creating, and iterating on web standards to express common semantics designed for humans first, machines second.
Janrain Engage (formerly RPX) enables you to quickly register and login users on your site via their existing Facebook, Google, Yahoo, Twitter, or OpenID accounts.
myOpenID
OpenID
Run a web site and want to make it easier to sign up or sign in? Find out how to add OpenID to your site in a few steps by using a free, open source library.