Skype Toolbars is an add-on for probably the most widely-used browsers - Internet Explorer, Firefox and Google Chrome.
Skype is a program that will let you make phone calls through your PC. Skype Toolbars cannot be downloaded as a separate program, as it comes bundled with the Skype installer since the 3.0 version. However, you can opt to install it or not during the full program installation.
It places a button in your browser’s toolbar that can be used to activate/deactivate the Skype Extension for your browser. When activated, it will automatically highlight every phone number found on a web page (and, if desired, the name related to that number), allowing you to place a phone call through Skype just by clicking on the highlighted phone number. When you click on a number, you will also have the opportunity to change the country code that Skype must dial to communicate with that phone number. You can also add this number to your Skype contacts, or send it to the clipboard for later use.