Other than friends and family, maybe you could place an ad on petfinder. You can do a google search for no-kill shelters in your area, but I'd save that for a last resort because they could be in a no-kill shelter for a very long time.
Try your vet, see if anyone they know of is looking for a pup that would be a good home. The last time I went to my vet I noticed they have stickies on the wall (where they can see when they're on the phone but others cant) and those stickies were peoples names and what they were looking for. Worth a try
Run an ad in the local newspaper, but screen the potential adopters. Be sure that they have the financial means to care for a new puppy. The puppy may be cute and fluffy now, but will they still take care of it, once it is full grown?
Since they will be large dogs, put ads up at the local feed stores, maybe you can find them homes in the country. Also, post ads at the vets offices.
Did you have your female dog spayed after she had the litter? This is a good option, since you obviously don't need anymore puppies in your household. Is she kept indoors or out? If she is an outdoors dog, you could have another litter in approximately 4 months.
If you can't afford to have her spayed, check with the local animal society, vets or shelter. Many times they have programs or grants available to help with the cost of a spaying or neutering for low income households.