Too bad EA cease and desisted the open source reimplementation, Simitone.
It's still on GitHub: https://github.com/riperiperi/Simitone
Looks like the main dev mostly moved on to https://github.com/riperiperi/FreeSO
[1]: https://mobile.twitter.com/Simitone/status/12027483512272691...
And about FreeSO: FreeSO is a The Sims Online reimplementation. The Sims Online is an improved version of The Sims 1's engine. Due to the similarities, riperiperi decided to make a The Sims 1 reimplementation based off FreeSO's engine, with support for mobile devices.
And besides, in theory EA couldn't even request that: The engine is a clean room implementation, the implementation doesn't use any of the original game assets.