There are many Organizations that can provide you with more information on how to trap and spay/ neuter a cat that you have been caring for and in some cases, help financially with getting them fixed and vaccianted. Unfortunately, in most cases, that is the extent of the help that these organizations can assist with. There are not many places for feral cats to go. If they do end up at an Animal Control facility, they will be euthanized.
Please visit the below organizations for more information and tips to get your feral kitty fixed and to properly care for them.
Here is a link from the Humane Society with many more groups that may be able to help: