Where can I find source code of HorseQC?

[TKONIY]

What is the different between HorseQC[2] and Hawk[1]?
Where can I find the source code of HorseQC?

[1] Breß, S., Köcher, B., Funke, H. et al. Generating custom code for efficient query execution on heterogeneous processors. The VLDB Journal 27, 797–822 (2018).
[2] Henning Funke, Sebastian Breß, Stefan Noll, Volker Markl, and Jens Teubner. 2018. Pipelined Query Processing in Coprocessor Environments. In Proceedings of the 2018 International Conference on Management of Data (SIGMOD '18). Association for Computing Machinery, New York, NY, USA, 1603–1618.