The developement of pec would not have been possible without the following free software:
  - ghc http://haskell.org/ghc/
  - llvm http://llvm.org/
  - gcc http://gcc.gnu.org/
  - bnfc http://www.cse.chalmers.se/research/group/Language-technology/BNFC/
  - happy http://haskell.org/happy/
  - alex http://haskell.org/alex/
  - hackage modules http://hackage.haskell.org/packages/hackage.html

In addition I'd like to thank the following people...

Sigbjorn Finne, Andy Gill, Iavor Diatchki, Lee Pike, Isaac
Potoczny-Jones, Brian Adams, Travis Rhoades, Mike Letner, Brevin
Letner, and my family

Thanks guys!