A thoughtful post Becky. I would encourage anybody who knows of a service that can help less fortunate dog owners to list them here.
Our humane society has something similar called the SNIP clinic. Not sure what the letters stand for but here is their site. http://www.kyhumane.org And here is a direct link to info on their S.N.I.P clinic. http://www.kyhumane.org/AdoptionsAndRescue/Operation SNIP/SNIP Clinic.htm#backgroundFor those living in Massachusetts, the MSPCA has a program that assists with low cost or free spaying/neutering. It is the SNAP program. Spay Neuter Assistance Program. You can get an application from your local MSPCA or contact the Boston office. Once you fill out the simple app you send it to Boston and within 2 weeks you receive a certificate. Depending on your circumstances, they will pay a portion or the whole amount of spaying or neutering your pet. Most vets accept these certificates, just be sure to ask yours if they will.
I don't know if this is a program sponsored by ASPCA, or solely funded by the MSPCA, but for someone in need of help, it's a great program.
Here is another one. I have no experience with them but their purpose fits the spirit of this thread:If you have any additional sites worth considering please submit them to a moderator.