Gizmo5 provides a free service much like Skype, that allows you to make free PC-to-PC calls. In addition to providing many of the great things that Skype provides (free PC-to-PC calls, instant messaging, regular phone calls with great rates, etc), Gizmo5 provides an instant conference calling service. You don’t need a Gizmo5 account to use it and you don’t even need a computer!

If you want to create a conference room without your computer, you can just dial (605) 475-8515 (USA phone number) and press 0 to create a new conference room. Be sure to write down the conference room number, because anyone you want to join will need to use it to enter.

If you want to create a conference room with your computer, just visit the Gizmo5 free conference call setup page. You enter your email address into the form, and then you will be brought to a page with your conference number. You will also receive an email with your conference number.

Once you have your conference room number, just give it to those you wish to attend along with the (605) 475-8515 dial-in number. When they call the dial-in number, they will be prompted for the conference room number. They can then enter the conference room number you gave them.

That’s all there is to it, and you can do it without even signing up for an account. However, if you’re outside of the USA or you don’t have an unlimited long-distance calling plan, you will need to sign up for a Gizmo5 account if you want to use the service without having to pay long distance charges.

Just download the Gizmo5 client and sign up for a free account.  They have clients available for Windows, Mac OS X, and Linux. Once you’ve installed the Gizmo5 client, you can launch it and create a free account right from the application.

Once you’ve installed Gizmo5 and logged into your account, just dial CONFERENCE. Once you’re connected, click the Dialpad tab and then enter the conference room number.  You’ll be connected to the conference room and will be ready to chat with the others as they join.

What free conference calling services do you use? Are you aware of any other free sites to setup instant conference calls? Let us know in comments!