Haskell source code suggestions; profiling libraries

 HLint gives suggestions on how to improve your source code. It can either
 print them directly, or generate a colored HTML output.
 .
 This is the HLint library, used by programs that want to incorporate HLint's
 functionality.
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.