#s 1 & 5 are Vacor. #6 looks Asian, #3 is from a JABO investor's run, #4 might be Vitro but could use another view or two, and not sure about #2 - more views might help.
Bullet molds are historically associated with Czechoslovakia (the Czech Republic or Slovakia now). Here's an old one . . .
I have no idea who might be making them now though.