What is Lightstreamer in a nutshell?
Lightstreamer is a Push Engine, i.e. a server software that is able to push (or stream) any textual data in real-time to any types of clients across the Internet. Lightstreamer hides all the complexity of pushing data in a scalable, efficient, reliable and portable way. On the client side several APIs are provided, so that it is very easy to build Lightstreamers clients (transforming your existing client or creating a new one from scratch). A special Web 2.0 library makes it possible to update Web pages in real-time through a zero-install, applet-free client. On the server side the provided APIs make it possible to build custom Adapters in order to integrate Lightstreamer with your data source. Basically, Lightstreamer can be considered a publish/subscribe middleware based on HTTP protocol.