ABellTolls - Long Distance Comparison
OneSuite - Inexpensive Long Distance
OneSuite offers an inexpensive long distance service with U.S. rates starting at 2.5 cents per minute (using a local number) or 2.9 cents per minute with a toll-free number. And there is no monthly fee!

BigZoo long distance service
BigZoo offers an inexpensive long distance service with U.S. long distance rates of 2.9 cents per minute (using a local number) or 3.9 cents per minute (using a toll-free number). There is a 75 cent monthly fee, however.