Reshared post from +Alex Wiesen
When I'm travelling I like to call my family from the Google Voice website on my laptop, but without a phone handy, it's a little hard to use. To make things easier, we've just added Hangouts as an option when making calls from the web. It works even if you aren't using Hangouts in Gmail, and doesn't require a Google+ account. Try it the next time you place a call from the Google Voice website — I think it's a much easier way to keep in touch with people.