Seeing posts about Wings3d makes me miss Nendo and what it could have been. I had so much fun playing with that over a decade ago. I just hated that many times it'd end up crashing or a subdiv gone wrong would ruin the model and it had limited undo.
I tried Wing3d, but somehow it never felt the same.
Never heard of nendo, I will look it up. I had to take courses in school using Maya and Blender. I was terrible at both, but had a little more success with Wings3D. I have heard Blender is better now (this was the early 2010s).
https://opengameart.org (open art collection)
https://www.beepbox.co (music sequencer)
http://www.roguebasin.com/index.php?title=Finding_graphical_... (tilesets)
http://grafx2.chez.com/ (pixel art program)
http://www.wings3d.com/ (3d modeler, easy to use)
http://spiralgraphics.biz/packs/ (tiling textures)