I've been working on Peatio for a few years, the open source Bitcoin exchange, currently trying to make it more usable. The project has now been forked, dont know what happened to the original Chinese developers anyway here it is at the moment: https://github.com/muhammednagy/peatio . Good progress is being made so consider a donation we want to make it easier to add new cryptocurrencies other than that its working (for Bitcoin) and integrates with Bitgo and AWS. Intend to formulate a security tutorial with plan for cold storage wallet management, looking for people to help with this and anything we might be missing on locking down the servers.