SubSonic is an open-source toolset, created by Rob Conery, as an attempt to put the fun back into programming and just get the job done. Inspired by Ruby on Rails, SubSonic takes a minimalist approach to coding and emphasizes convention over configuration. While it takes its inspiration from Ruby on Rails, it is not a port of it. (Check out MonoRail it that’s what you’re looking for.) Instead, SubSonic takes the best ideas of Ruby on Rails and adapts them into the already existing ASP.NET framework.
Just started playing with it, and man it looks good.