Quizlet is an online learning tool created by Andrew Sutherland with the aim to make learning more exciting. The Quizlet PHP code sample demonstrates three steps authorization with the user, creating next an example API call. The objective of this code is to display the username and titles for the person who logs in. To gain a more clear idea, developers need to sign up for the 2.0 API.
DokDok, a Montreal-based startup, has had an email attachment management application on Google Apps some time. To make this work, it made an API to use internally that intelligently uses email accounts as if they were datastores. Recently, the company announced that this API would be renamed Context.IO and available to all.