Wikipedia
Spikko
Spikko is a software based service that allows users to make voice calls over the Internet, PC to phone, phone to PC and traditional phone to phone international calls. Initially it was a freeware, but starting from 2 August 2011, it is no longer free Existing users were displayed a notice upon login, and are required to pay to continue their services. Nowadays Spikko offers various services related to international telephone services.