Resin and filament, bonus points for laser sintering or anything else.
EDIT: Thanks to all the commenters, especially fanalarbiter, here’s the best list we have so far:
FDM:
Resin:
SLS:
Powder bed fusion metal 3d printers: reAM250
Resin and filament, bonus points for laser sintering or anything else.
EDIT: Thanks to all the commenters, especially fanalarbiter, here’s the best list we have so far:
FDM:
Resin:
SLS:
Powder bed fusion metal 3d printers: reAM250
OS is pretty hard, Prusa is moving away from OS and I wouldn’t consider them fully OS anymore. There are a lot of good projects around Voron community and I think RatRig is OS, but apart from that I don’t think there is a big OS project alive anymore. Saying that, there is a shitton of smaller projects, not full 3d printers, but motion solutions, extruders, electronic solutions, filament swappers and such, everything you need to build a 3d printer yourself.