Drax
Arcane
That's because it runs sql server to store data, hashes stats/credits/lessons/periods independently each and stores them as sql database thus posing problem to use cheat engine.
On the other hands, there are indie devs, like Josh Parnell (Limit Theory) which are completely capable of programming an efficient and capable engine on their own.
The obvious point being, in any industry there are always capable and responsable people and cheaty lazy people (like me)