Haskell (literate style) mode for Vim
Syntax highlighting for literate Haskell scripts for the editor Vim by John Williams.
Haskell Mode for Emacs
An Emacs mode currently supporting font locking, declaration scanning, documentation, indentation, hugs interaction.
Haskell mode for Nedit
An Nedit mode by Koen Claessen that implements syntax highlighting and macros for Haskell comments.
Haskell mode for Vim
Syntax highlighting mode for Vim by John Williams.
Hugs mode for Emacs
Provides fontification and cooperation with Hugs -- by Chris Van Humbeeck.
JCreator for Haskell
An extension to JCreator, adding Hugs to JCreator as a tool and providing syntax-highlighting for Haskell.