Two I really enjoy are Index Card RPG by Runehammer, d20 done nice and light.
The other is Breathless by Fari Games, it has a free SRD and tons of games for it released under the Breathless Jam https://itch.io/jam/breathless-jam/entries
I take a look at the excellent The Monster Overhaul by Skerples.
Get it from Drivethru RPG: https://www.drivethrurpg.com/product/421868/The-Monster-Overhaul
Two I really enjoy are Index Card RPG by Runehammer, d20 done nice and light.
The other is Breathless by Fari Games, it has a free SRD and tons of games for it released under the Breathless Jam https://itch.io/jam/breathless-jam/entries