I've got a side project webapp I'd like to use to learn some Haskell. What is the most mainstream Rails-like web application framework out there? By Rails-like I mostly mean convention-over-configuration, with a strong ecosystem of plugins so I don't have to re-invent the wheel for auth, file uploads, etc. So far I've seen:

- Yesod

- Snap

- Happstack

- Scotty

- Spock

Right now I'm learning Yesod, but I don't feel confident that's really what I want. Which of these are closest to Rails? Which are closest to Sinatra?