Many people in here are just advertising their coins, which is very exptected, instead of giving actual recommendations.
If you seriously want to have a CPU-only coin, monero, karbovanets and microbitcoin are doing their best to keep not just ASICs and FPGAs away from their consensus but also GPUs.
Since those are giants compared to the other coins, you can rest assured that none of them is a shit coin you cant even sell anywhere.

Happy Mining,
Luke