There were GameHack and ArtMoney, they allow you to track memory address for specific value in game (gold, money, scores...) by input the value before and after changing it, and then allow to change the value at that address.
There is a link on the download page to a zip of the files, without an installer (or the installCore adware/bundleware).
>"For those that want to have Cheat engine without automated installer and installCore recommendation during installation, click here"
We as a community should be pushing back hard against open source developers who want to monetize their work with malware. There are better ways for them to make money from their work than something that's ethically dubious at best.
[1] http://man7.org/linux/man-pages/man5/proc.5.html
[2] http://man7.org/linux/man-pages/man2/process_vm_readv.2.html