Purecoin

Purecoin is a Haskell full-node implementation, by Russell O'Connor, available on github (mirrored from darcs). On its completeness and motivations, Russell comments:

• purecoin tries to be as simiple an implementation as I can get away with. The idea is more for documentation than for real use.
• it doesn't handle OP_IF, but I'm pretty sure there are many more unknown incompatibilities.
• I guarentee that purecoin is not entirely compatible with bitcoin

See Also on BitcoinWiki

• Zloadr
• MPCX
• AvaGo
• ALLUXE
• Dylyver