Here are some cool, free (Creative Commons) downloads I found for your
listening pleasure:
https://archive.org/details/Game_Tunes-14289
The Game Tunes EP is a nice blend of IDM, chiptune, and 90's arcade
game sounds. "Level 2" and "Level 3" are maybe my favorite tracks. The
rapid-fire drum work on "Game Over" is reminiscent of Untitled by
Autechre.
https://archive.org/details/bp013
The Pleh album is organic, tactile IDM. "Mercury" is contemplative,
almost melancholic. There are some beautiful ambient melodies in
"Testing Code" and "Are We Alone." Pleh was released on the
now-defunct netlabel Bypass, which has a lot of free electronica
albums that you can download:
http://bp.bai-hua.org/.
It's some really great stuff. There are some hidden gems on
archive.org and other free sites.