Rialto, a cross-browser javascript widget library
Here is the description of the project:
Because it is technology agnostic Rialto can be encapsulated in JSP, JSF, .NET or PHP graphic components.
Nowadays it supports pure javascript development and JSP/taglib development. A JSF integration is on the road. And we hope to start .NET and PHP integration soon.
The purpose of Rialto is to ease the access to rich internet application development to corporate developers. Ideally a Rialto developer have neither need to write or understand DHTML, Ajax or DOM code.
The target of Rialto is corporate web applications and not internet web sites.
The widgets include: forms, drag & drop, tree, data list with fix header and resizable columns, pop up, splitter,
Rialto enables single page interface application development. It is available as open source under the Apache License.
But you'd better take a look at the demo to get and idea of what it can do.
If you are interested to work on the .NET port, contact the project team.