You can try the Haskell Browser in the Eclipse plug-in.

2011/12/12 wren ng thornton <wren@freegeek.org>
On 12/12/11 9:32 AM, Ryan Newton wrote:
I don't know why Hoogle didn't find one of the packages.  I've often
wondered about this related question:

   * Is there a place to browse the union of all namespaces in all hackage
packages?

There is, and it's awesome:

   http://folk.ntnu.no/hammar/explore-hackage/

Though it can be a bit slow to load, so try not to hammer the server too hard :)

--
Live well,
~wren


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