I work with asp.net.
I want to write realtime application without ajax polling.
I need free technology - something like node.js and socket.io.
What is the alternative for asp.net - NODE.JS and SOCKET.IO?
Check out SignalR
Async signaling library for .NET to help build real-time, multi-user interactive web applications
I've used AspComet in the past.
Source code: https://github.com/nmosafi/aspcomet
Overview: http://neilmosafi.blogspot.com/2010/11/aspcomet-high-level-architecture.html