Packet8 has a number of voip plan options which include voice and video call packages. You can make unlimited calls within the USA and Canada for $19.95 p/m.
Packet8’s Freedom Unlimited Global plan offers the opportunity to make unlimited calls to 40 selected countries from around the world including the U.K., France, Germany and Australia for a very reasonable monthly price.
They offer all the standard voip features such as caller ID with name, three-way calling, call waiting and online account management. But, there is another interesting feature called voicemail to email, that allows you to get your voicemail messages via your email account (as an attachment to an email). A very handy feature.