Bitcoin Forum

Litecoin, which is an altcoin that has long been marketed as the “silver to bitcoin’s gold”, was not the most difficult thing for creator Charlie Lee to launch. He simply took the Bitcoin Core codebase, changed a few parameters (such as the block time and mining algorithm), and then posted the new creation on bitcointalk.org.

More than six years after this initial launch, this close relationship to the code found in Bitcoin Core, which is effectively the reference implementation of the Bitcoin protocol, has become one of Litecoin’s greatest strengths.

https://coinjournal.net/charlie-lee-wants-test-new-solution-bitcoin-fee-estimation-litecoin/

sounds interesting...