StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.

gevent - gevent is a coroutine -based Python networking library that uses greenlet to provide a high-level...

AFSAnalytics - AFSAnalytics.

Lightstreamer - Lightstreamer is a server for delivering real-time messages to browser-based and mobile...

Woopra - Track your customers' web and mobile activity, forms, emails, support tickets and more, all in one place with customer analytics. Analyze and take action.

Socket.io - Realtime application framework (Node.JS server)