Microsoft's Outlook.com email service has some nifty features (including flexible disposable email addresses). The latest addition? It's now directly integrated with Skype, so you can make voice or video calls direct from your browser.
Microsoft rolled out a trial version of this option back in August last year, but that was only supported in a limited number of countries. Now the option works worldwide, and also has built-in HD calling support.
To use Skype in Outlook.com, you'll need to install a browser plug-in. You'll also need to have merged your Microsoft and Skype accounts, though if you've used Skype at all in the past year, that's likely to have happened already.