Microsoft has opened up public access to its Messenger IM network via XMPP, enabling Apple and others to build open clients capable of interacting with Microsoft users. In a new "Inside Windows Live" ...

When Google announced that it was consolidating its Voice-over-Internet Protocol (VoIP) instant messaging and video-conferencing services into Google Hangouts, the Electronic Frontier Foundation (EFF) ...

Despite licensing the proprietary ActiveSync Exchange Server protocol from Microsoft for use with the iPhone, Apple is building its own Push Notification Server for messaging services in both the ...