Reactop is a mod adding reactors to Minecraft.
This mean you are on the unstable branch for Minecraft 1.15.x. Compiling from this branch might result in errors.
Currently for Minecraft 1.15.x, you will always be able to compile from here.
Reactop is under MIT License.
The mod is not published on CurseForge nor uploaded on any other website and must be compiled by hand. It will be published when having an acceptable minimum features.