Nexmo offers a series of cloud-based communication APIs that make it easy to integrate reliable communication services into any application. This tutorial by Tim Lytle on the Nexmo blog shows followers how to build a simple text message group chat using the Nexmo SMS API and PHP.
Hipmob is an easy-to-use mobile chat client that works to connect customers with customer service and support, in real time. It's a simple process of integrating the Hipmob library into the Android or iPhone app, then logging in to any Jabber or XMPP enabled IM client.
Messaging just got a lot more interesting to look at. Words say a lot, but a picture is worth a thousand of them; imagine the levels of communication that could be achieved using both. Doodle Republic is a messaging platform that provides the tools to create messages that include words and images. Basically, people chat by creating their own art and sending it to friends as a Chatoon. The Doodle Republic Chatoon API makes this functionality available to developers who may want to include it in other applications.