FlashPhone - A Russian VOIP company is offering free VOIP calls to all the major countries worldwide, this free web-service allows you to call directly from a standard webbrowser without installing anything (needs Adobe Flash Plugin), temporarily only one call of 5 minute duration per day is allowed. SIP compatible Flashphone is easy to use and is totally web-based, you can make and receive calls using any VoIP provider in any place on the Earth. You can also use the mobile version of flashphone on PDAs, communicators and smartphones.

Click Read More to get the free registration link...

Lypp is offering free calls to Canada and North America till 31 October 2007, Lypp utilizes existing IM networks like Google Talk, iChat, ICQ, MSN, Jabber, AIM and Yahoo! to initialize group calls. To do so, users will send a command message to the Lypp IM bot with a command like: call [phone number, phone number, phone number]. Lypp will then call your phone and those of your friends, connecting all in a conference call.

Using the service is very simple just browse your video file from your computer and choose output format, you do need a high-speed connection for fast uploading.