The Sinch SDK allows developers to add voice calling and/or instant messaging to mobile apps. It handles features like signaling and audio management while and also allows for the creation of a user interface.
Flickr has added more real-time goodness to their photo API. Using a publish / subscribe (PubSub) system, developers can now receive real-time updates across millions of photos across Flickr friends, Flickr Commons, and by tags and geo-location using the Flickr Real-Time API.
Twilio today announced that it has added support to its API for LINE, a popular free communication app that allows its more than 168 million users to make calls and send messages. LINE support is part of Twilio Channels, a feature of Twilio's API designed to build messaging experiences.