[bitcracker]

I would also recommand EclipseFP. It is an amazingly well working Eclipse Plugin for Haskell with incremental compiling, debugger, Smalltalk like browser, and other nice features.

http://eclipsefp.github.io/features.html

[exceptione]

It is a very good plugin. Moresmau and other contributors deserve a statue.

It even has support for uuagc (dsl for attribute grammars)!