A light weight application server framework.
It's cool and absolutely easy. :)
There are a lot of features in this lightweight application. We have made an enterprise financial application on top of this framework and the overall performance is very good and thanks to SOA architecture of the framework the development time is notably short and helps us to easily make changes and add new services to our product. Another feature that we can't leave without is the multiple communication channels, that let use to have different types of clients such as web applications, windows applications, mobile programs and so on.