Google

Call phones from Gmail

Install voice and video chat

Requires Windows XP+ / Mac OS X 10.4+ / Linux

Try it now

Click above to be taken to Gmail

No phone required Use an internet connection and microphone to make calls
Cheap international calls Call around the world at very low rates
Video chat, too Install the plugin and get video chat for free

Make calls to any phone — right from within Gmail.

This feature is currently not available in all locations.