Im looking for available web based software for a new exchange, whats available? what are others running?
I don't understand the affinity for a web based platform. Web apps are not secure; it was never designed for secure sessions. Look at the exchanges that are having problems / getting hacked; they all have one thing in common. They are web based.
Web Application can be secure. But they need to be tested by Ethical Hackers before going online. And also any changes in the web app. It need to be tested offline in a control environment, such as only in local network. Then once it is secure then go online.
That is why there are always a mirror site for financial sites, such as Online Banking. I know because I help them do their security architecture.