<p>OneLogin is a cloud-based single sign-on solution that is pre-integrated with hundreds of popular web applications, such as Salesforce.com, Google Apps, Zoho, WebEx, GoToMeeting and Yammer. </p><p>SAML is used for the applications that support it while other sites use OpenID and API integration. </p><p>    http://www.onelogin.com </p><p>SaaS vendors are welcome to submit their own apps for integration for free here: </p><p>     http://www.onelogin.com/vendor</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>OneLogin is pre-integrated hundreds of popular web applications</p><p>&nbsp;</p><p><span style="line-height: 19px" class="Apple-style-span">PingFederate is a standalone federated identity server utilizing SAML 1.0, 1.1 and 2.0 to enable secure single sign-on to Internet applications for employees, customers and business partners.</span> </p>