Wiki:
http://hackage.haskell.org/trac/ghc/wiki/Commentary/Rts/Storage/HeapObjects

Hood:
http://www.haskell.org/pipermail/haskell-cafe/2012-January/098867.html
http://hackage.haskell.org/package/hood
http://www.ittc.ku.edu/csdl/fpg/software/hood.html

ghc-vis:
http://hackage.haskell.org/package/ghc-vis ()
http://felsin9.de/nnis/ghc-vis/
http://felsin9.de/nnis/ghc-vis/thesis

ghc-vis-0.6-src\src\GHC\Vis\View\Graph\Parser.hs 
  --{ globalAttributes = [GraphAttrs [BgColor [RGBA 0 0 0 0], FontName fontName, FontSize graphFontSize]]
  { globalAttributes = [GraphAttrs [BgColor [toWColor Black], FontName fontName, FontSize graphFontSize]]

ghc-heap-view
http://hackage.haskell.org/package/ghc-heap-view
https://www.joachim-breitner.de/blog/archives/590-Evaluation-State-Assertions-in-Haskell.html
https://www.joachim-breitner.de/blog/archives/548-ghc-heap-view-Complete-referential-opacity.html

vacuum
http://hackage.haskell.org/package/vacuum (http://thoughtpolice.github.com/vacuum/)
https://github.com/thoughtpolice/vacuum (https://bitbucket.org/thoughtpolice/vacuum)
!!!
https://github.com/thoughtpolice/vacuum/blob/master/src/GHC/Vacuum/ClosureType.hs
https://github.com/thoughtpolice/vacuum/tree/master/src/GHC/Vacuum/ClosureType
https://github.com/thoughtpolice/vacuum/blob/master/src/GHC/Vacuum/ClosureType/V700.hs
https://github.com/thoughtpolice/vacuum/blob/master/src/GHC/Vacuum/ClosureType/V702.hs
https://github.com/thoughtpolice/vacuum/blob/master/src/GHC/Vacuum/ClosureType/V704.hs
https://github.com/thoughtpolice/vacuum/blob/master/src/GHC/Vacuum/ClosureType/V706.hs

Articles:

Yang - anatomy of thunk leaks...
http://blog.ezyang.com/2011/05/an-insufficiently-lazy-map/
http://blog.ezyang.com/2011/06/pinpointing-space-leaks-in-big-programs/

Presentations:
https://www.bitba.se/i-accidentally-the-entire-heap/ (https://github.com/bitbasenyc/heap)

Mitchell - space leaks:
http://neilmitchell.blogspot.fr/2015/09/detecting-space-leaks.html
https://www.reddit.com/r/haskell/comments/3luonb/detecting_space_leaks/
https://queue.acm.org/detail.cfm?id=2538488