Koala is a Ruby library for Facebook that allows developers to access the Facebook Graph API, REST API, OAuth validation, realtime updates, and test users. It supports JRuby, Rubinius, and REE in addition to multiple versions of vanilla Ruby.
There are already millions of apps available that have great content, and there'll be many more to come. GROUPcentric provides a product that aims to add a new and exciting layer in social sharing functionality that allows content to be shared, not only via the large scale Facebook and Twitter options or email and SMS, but an in-application sharing service that makes it possible for users to privately share content with groups of friends that can be accessed on any app. The GROUPcentric API and SDK allow developers to integrate this functionality with other applications.
Who has time to fit exercise into their busy schedules these days? Or maybe there is time, but most of us simply lack the motivation to get up and do it. So what if there was an app that could give you that motivation? The Running Club app is a virtual running club that allows users to schedule live activities with friends in different locations.
Twitter has cut Emojitracker's access to its Streaming API, causing its creator, Matthew Rothenberg, to announce that he will shut the service down in April. Emojitracker provides a real-time visualization of emoji symbol usage on Twitter and has tracked some 14 billion emoji tweets.