If you are looking for something very similar to Bitcoin but with added features or restrictions check Bitgesell, since your thread is about coins with a good future like Bitcoin here is an article by Cointelegram on Bitgesell you will find it interesting and the very good news is it is still very cheap at $0.037

https://cointelegraph.com/press-releases/introducing-bitgesell-the-blockchain-focused-on-scarcity