A startup company similar to Jajah

It focus on the mobile VoIP market. Anyhow, you can make call from java client on mobile phone or via the website.

Here is the address for regisitration

https://www.tokiva.com/signup.php?refercode=414478

Every new user have 100 credits to try, which equal to more or less 15 minutes according to their website.

You can also introduce your friends to register and get 50 credits for each successful invitatioin.