Haskell Websites
repl.it
Powerful and simple online compiler, IDE, interpreter, and REPL. Code, compile, and run code in 30+ programming languages: Clojure, Haskell, Kotlin (beta), QBasic, Forth,...
8,729 
$ 1,634,040.00
spoj.com
SPOJ (Sphere Online Judge) is an online judge system with over 315,000 registered users and over 20000 problems. The solution to problems can be submitted in over 60 languages...
38,573 $ 348,480.00
haskell.org
The Haskell purely functional programming language home page.
34,081 $ 393,840.00