I prefer to use Linux, I try to keep my choice of software aimed towards cross platform use and free as this hobby is expensive enough.
Siril
Siril is a cross platform astrophotography image processing tool.
G.I.M.P
a cross platform image manipulation program. This is a free alternative for editing your stacked images.
Starnet++
Another cross platform tool. This can be used to create star masks and removal of stars for separate processing.
https://www.starnetastro.com/download/
Astroberry
A raspberry pi based control center. This can control all your equipment using a indi server.