FIX API Engine: Quickfix
QuickFIX is a full featured messaging engine for the FIX protocol. It is a 100% Java open source implementation of the popular C++ QuickFIX engine.
Liquidity Provider: Advanced Markets
Advanced Markets is a Forex liquidity provider that supports FIX API trading
Liquidity Provider: Exante
Exante is a Cryptocurrency liquidity provider that supports FIX API trading
Liquidity Provider: Price Markets
Price Markets is a Forex liquidity provider that supports FIX API trading
Liquidity Provider: Swissquote
Swissquote is a Forex liquidity provider that supports FIX API trading