http://www.sosohio.org/
https://www.columbusdogconnection.com/
https://capitalcityspayandneuter.com/
https://spayandneuteroh.com/
If You have no money to afford the low cost spay or neuter and/or are on some assistances, here are some places that can help.
http://www.catwelfareassoc.org/altering
https://www.columbushumane.org/
https://humaneohio.org/
http://snapofcentralohio.org/
Some of these you may have to call or email, but please help out a cat and in your community. If you need help assisting in catching a wild or feral cat, they may be able to connect you with someone who is willing to help you or train you on that.