https://github.com/StateOfTheArt-quant/awesome-high-frequenc...
https://github.com/AlexWan/OsEngine
https://github.com/hummingbot/hummingbot
https://github.com/rorysroes/SGX-Full-OrderBook-Tick-Data-Tr...
https://github.com/Crypto-toolbox/HFT-Orderbook
https://github.com/Manudecara/Algo-Trading
I also had some fun with the challenges on Quantopian, but that shutdown a couple of years ago (https://en.wikipedia.org/wiki/Quantopian).
https://github.com/StateOfTheArt-quant/awesome-high-frequenc...
https://github.com/AlexWan/OsEngine
https://github.com/hummingbot/hummingbot
https://github.com/rorysroes/SGX-Full-OrderBook-Tick-Data-Tr...
https://github.com/Crypto-toolbox/HFT-Orderbook
https://github.com/Manudecara/Algo-Trading
I also had some fun with the challenges on Quantopian, but that shutdown a couple of years ago (https://en.wikipedia.org/wiki/Quantopian).