please help urgent mommy cat

My beautiful mommy cat is extremely skinny shes still eating but is very weak she bearly meowa when shes usually very talkative. I dont have money to take her to the vet...please any help is appreciated thank you

She most certainly NEEDS to be seen by a Vet to try to determine what is wrong, as certainly something is. 

Is she eating the usual amount, or not eating much?  Has she always been skinny, or is this something new?  I just went back and read your previous threads and see she had one kitten in July and it died and she didn't deal well with it.  Has she been losing weight since then? 

If she is not eating her normal amount you may need to assist feed her.  Here is a thread that might help you with that:  http://www.thecatsite.com/t/227858/syringe-feeding-lucky-video-if-your-cat-is-not-eating.  You could try adding Nutrical to it or perhaps some egg yolks for added protein and calories, but I really think you need to try to borrow some funds to see a Vet and try to find out if she has something wrong that is causing her to lose weight and be so weak.  It's possible she is weak due to not eating enough...I don't know because you said she is still eating...if she is just eating a tiny bit that it IS possible.  We need more information.  Cats who eat even only half of what they should can get Hepatic Lipidosis, which can be deadly if not caught and treated in time.

Here's an additional thread that might be useful to you:  http://www.thecatsite.com/t/155462/cant-afford-a-vet-please-read