Intellij license server
After my reverse engineering research was done it was just a matter of putting it all together into a Python script and turning it into an asynchronous back-end that was emulating their license API. It was able to function as a perpetual license server for all Jetbrains products in 2017 after which Intellij patched it in 2018.
This is project was used as blueprint to build another Python back-end for a reverse engineered game.