A little while ago, I published E2 rules for 5th edition DnD. Now I've gone to the logical extreme and turned them into E0 rules - characters are all "0 level" and only advance by feats. This is similar to how my Legend of the Wayfarer rules work. The only levelled characters in this world are "gods" who go to levels 1-5. I may work out the "god" class later on (it will be quite close to the bard class).
Roll your abilities
You can use whatever method you like, but I'm going for the DCC way of 3d6 in order (but I'm doing this for 2-4 characters per player, so at least one will be good).
Each character has 12 hit points + CON modifier.
Each character has a +2 proficiency bonus.
Choose your racial benefits
My world is human centric so they are the only option (of course, you can use whatever races you like). To increase variety amongst characters, I will use the variant human traits (PHB page 31) where you can increase two scores by 1 point, gain proficiency in one skill and gain 1 feat (PHB page 165).
Also choose other details and equipment (you can use Bernie's random tables)
In addition to their human feat, players can now choose 3 extra feats.
The character can then improve for every 500xp they get. The character gets to choose whether to get 2 ability points either for one ability or split between 2 ability scores OR they can get another feat. Bear in mind that some feats are of limited or no use in this world.
Skills are no longer tied to any stat and multiple skills could help with a particular roll.