Windows

Editors

• Emacs, Vi(m), etc
• Visual Haskell
• Eclipse

Compilers

• WinHugs
• GHC : Special note for Cygwin users - http://www.haskell.org/ghc/docs/latest/html/building/platforms.html

Libraries

• GUI : WxHaskell (new release in progress, goal < 2007-01). Note, see also WxHaskell Install
• Win32 - low levelish bindings to Windows API. Comes with ghc and non-minimal hugs distribution. Win32 darcs repo
• HDBC-ODBC under Windows for database access.

Special tips and tricks for Windows

• darcs : http://wiki.darcs.net/index.html/WindowsConfiguration (although darcs send seems to be broken for now [2006-08-30])
• Make sure your Haskell compiler (e.g. GHC) and tools are on your system path: http://www.computerhope.com/issues/ch000549.htm
• GHCi: Using GHCi from a DOS box sucks. Using it from withing shell mode in Emacs sucks a lot less - do 'M-x shell' in emacs, then type 'ghci'.
• GHCi on cygwin: When running GHC under a Cygwin shell on Windows, Ctrl-C sometimes doesn't work. A very good workaround is to use the rlwrap program to invoke ghci : In addition to proper Ctrl-C, you also get emacs (or vi) key bindings and command history across sessions.