I'm building an iOS app which needs real-time updates from the server, and I'd like to accomplish this without polling.
Does anyone know of technologies, tools, products or libraries which would facilitate this functionality?
Pusher (who I work for) has an Objective-C library and a REST API (along with a number of libraries) that would let you push realtime updates from your server into an iOS application.
I've also compiled a list of realtime technologies in which I'm sure you'll also find technologies that meet your requirements.