Scotty - Scotty is a Haskell framework inspired by Ruby's Sinatra.
Yesod - Yesod is a development tool used to create highly efficient websites and web applications from the ground up. Yesod includes almost everything you need to build a website, from templates to routing and execution. Read more about Yesod.
IHP - The fastest way to buildtype safe web apps 🔥
Servant - servant is a set of libraries that makes building Haskell webservices a breeze.
Nested-Routes - Very similar to Scotty, except with the ability to nest handlers and embed parsers as a location to handle.
Snap - Snap (formerly BYOB) is a visual, drag-and-drop programming language.