What source code is worth studying?
plinkplonk: One way to find code worth reading is to select inspiring developers and look at their code. Most of the developers in "Coders At Work" for example, have Open Source code we can look at learn from.The best code I've seen: -Common Lisp - "Paradigms of Artificial Intelligence Programming" by Peter Norvig and "On Lisp" by Paul GrahamC - "C Interfaces and Implementations"  and  "LCC- a compiler for ANSI C" both by David Hanson. I also found the code for the Player/Stage robotic sim framework surprisingly readable.I liked the Scala Actors library code as well.If any HNers know any great codebases  in Haskell or Erlang, please post here.