NemerleWeb is a Web MVVM library for .Net. It uses reactive data model which allows creating rich internet applications.
The site contains all you need: tutorial and samples.
There is no binary builds yet, but you are free to download source of NemerleWeb from Github.
NemerleWeb is licensed under MIT license http://www.opensource.org/licenses/mit-license.php. Nemerle.Peg is licensed under Nemerle license: Nemerle project.