Is it any open source Bitcoin exchange code is available
2 Answers
Justcoin uses snow which is open sorce. I don't know if you are asking about Justcoin or Snow, either way, any of those two should be the answer to your question.
openex is another open source exchange but the trade engine is not free and you should pay for that. Can be found on https://github.com/r3wt/openex
