Vinegar- Wipe down your countertops, cupboards and any other places where you've spotted ants with a 50-50 mixture of white vinegar and water. Repeat throughout the day to maintain the efficacy. Or you could use a spray bottle and spray the carpet if that is where you are finding them.
Spices-Herbs/Spices
Spinkle cinnamon, mint, chili pepper, black pepper, cayenne pepper, cloves or garlic whichever one you happen to have in the area where you've seen ants and along your home's foundation. Bay leaves can also be placed in cabinets, drawers and containers to further deter those pesky critters.
Coucuos- sprinkle where you find them. It expands their belly and um yes they burst. Sounds really harsh.
I got all this off the web. Hope some of these help you. Good Luck!