Tumblr allows bloggers to post multimedia content. From photos, GIFs, and TV shows to jokes, Spotify tracks, and videos. The official library available in PHP allows interaction with the API, which can read Tumblr data to write a Tumblr post.
Like Me Date Me is a new dating site built on top of the Facebook Graph API, which provides search-able access to user profile information. The service displays a photo and limited profile information of whichever gender you want to see. As the name of the site implies, users can "like" others, which can then lead to more interaction. The ratings approach, encouraging snap judgments, is similar to HotOrNot, which also added an option to meet the people you rate.
For several years millions have shared the places they've been using the Where I've Been website and Facebook application. The site also has an API (our Where I've Been API profile), which allows for much of the same functionality, such as searching countries, marking it visited and adding content such as a story or photo.
Can you hear the longtime Twitter users breathing out a collective "finally?" The micro-blogging giant announced that a list feature will launch soon. First it will only be accessible on the main site, but it will also be added to the API (our Twitter API profile).