QuickFIX(Financial Information eXchange)

1. QuickFIX/J ​https://quickfixj.org/
2. github quickfix ​https://github.com/quickfix/quickfix
3. fixprotocol ​https://github.com/topics/fixprotocol
4. ​https://fixtrading.org/standards/fix-protocol/
5. ​https://fixprotocol.io/
6. ​https://github.com/FIXTradingCommunity/fix-orchestra
7. wiki fix ​https://en.wikipedia.org/wiki/Financial_Information_eXchange
8. Financial Information eXchange (FIX) Protocol ​https://medium.com/@yuvchauhan15/financial-information-exchange-fix-protocol-ec3bcd4a6edd
9. ​https://quickfixengine.org/c/documentation/

FIX Dictionary

1. ​https://www.onixs.biz/fix-dictionary.html
2. ​https://ref.onixs.biz/fix-message.html