Tell.ly is a cloud phone service for your business
There are two options:
1. Pay as you go. Rate is 10¢ per any minute (local or international or toll-free). It's great if you use telephony occasionally or don't have a lot of calls.
2. Or buy a package. It's cheaper to buy a package if you call a lot. This way the per minute rate (including long distance) drops to 5¢.