guppies, tetras, that's all i can think of. but then my freind has keepin a molly, female betta and a gold fish in the same tank for two years and they r all healthy.
Tetras won't be happy by themselves. They need groups.
The only thing, I can think of, is some kind of Gourami. Like a Dwarf, or Thicklipped. They stay small, and usually get along well with other fish. All other fish I can think of, need groups.
How many mollys do you already have in the 10gal and their genders? A mollys best friend is another molly but at best you can only fit 2 mollys in a 10gal of same gender...
If the tank is mature, i'd go for 4 panda or pygmy corys or similar small species of cory and maybe 2 female platys, but you won't be able to fit many fish in the 10gallon due to the mollys needing lots of swimming space.
Careful with Panda Cories. They are very sensitive to water conditions, and they get bacterial infections easily. Make sure you keep the tank very clean, and keep them on sand, not gravel.
Well thanks but one of the females died, I returned the other one and moved the snail I put in with them. So if you have any suggestions for what to put in the tank I'll be happy to hear them.