Free software alternatives for software like substance painter/designer, zbrush(besides sculptris), marmoset toollbag, marvelous designer, and others (essentially every thing to take a game asset from step one to game ready
Blender should cover all those bases. It has sculpting and 3D painting. I think a Marvelous Designer like tool is being added in 2.8 as well. Or it was a plugin, I can't recall.