Here is a site that lists Low Cost (and sometimes free) spay/neuter clinics. They are listed by state.
http://www.lovethatcat.com/spayneuter.html
Mods, please consider making this a sticky. There is some great information here.
http://www.lovethatcat.com/spayneuter.html
Mods, please consider making this a sticky. There is some great information here.