Programs I use
Notepad ++
https://notepad-plus-plus.org/
Gimp2
https://www.gimp.org/downloads/
Umodel
http://www.gildor.org/en/projects/umodel
https://notepad-plus-plus.org/
https://www.gimp.org/downloads/
http://www.gildor.org/en/projects/umodel