Lovin Fish
Aquarium Advice Freak
How about golden wonder kilis? They're really colorful and active. My only concern would be that they might not get along with the betta.
Thank you I looked them up and they are pretty neat fish. But, unfortunately, I believe when fully grown they will make a meal out of my female betta. Just read that others had experienced such a thing happening. They might be something I concider when my betta has crossed the rainbow.