With my recent 3D printer purchase, I started looking into filament. Wanted to keep a list of companies giving away free filament as samples. Keep in mind that you have to pay for shipping in some (most) cases. I'll update as I find more, since I'm usually on the lookout for these Hoping to find some cool filaments or really reliable ones as new ones come out!
I may not have ordered all of these; Sometimes they're not available in my country. Nor do i know these sites in person.
Let me know if you know of others, or if one of these no longer work. I'll try to update.