Here are 3 I found (I haven't played any of them personally, but I've heard they're solid).

Freeform/Universal Generic RPG that mixes concepts from games such as Savage Worlds, OpenD6 and FATE. And it's only 23 pages long. https://img.fireden.net/tg/image/144...7353770099.pdf
OpenD6 http://opend6project.org/
Wushu by Daniel Bayn - high octane action TTRPG. http://danielbayn.com/wushu/