The Financial Information eXchange (FIX) protocol is a messaging standard developed
specifically for the real-time electronic exchange of securities transactions.
FIX is a public-domain specification owned and maintained by FIX Protocol, Ltd (FPL).
QuickFIX/J is a full featured messaging engine for the FIX protocol.
It is a 100% Java open source implementation of the popular C++ QuickFIX engine.