-
https://www.openculture.com/free_ebooks
-
https://www.landfx.com/sketchupfeatures.html
-
https://getmailspring.com
-
http://elements-of-content-strategy.abookapart.com/01-foreword.html
Gaming
https://undraw.co/illustrations
-
http://freemusicarchive.org
-
https://www.blackmagicdesign.com/products/davinciresolve
-
http://librecad.org/cms/home.html
-
http://www.ar-cad.com/freecad/index.html
-
http://nttcad.altervista.org/free-cad