Sort:  

Muay Boran is the classic form of Thai Kickboxing. Classic means the old, true combat style and not for sports with rules.

Check out Lethwei. It's from Myanmar, and it's more brutal than Muay Thai.

Sounds interesting. Can you show me links of some vids of it?

Ahhh, yeah. I think there are some Lethwei fights on YouTube. It's really brutal, and it has less rules than Muay Thai. Some Muay Thai fighters sometimes go to Myanmar to compete in Lethwei. Search on Google.