Here are some free tools to help you share your screen with others:
1- Screen Leap
This is a free screen sharing service that allows users to share their screens with each other . To start using it just head over to its main page, click on ' share your screen' and enable the Java applet then send the sharing code to the individual you want to view your screen.
2- Quick Screen Share
This is another great screen sharing service. It works the same way as the previous one, head over to the main page and click on share your screen and you will be provided with a link to give out to your peers to start viewing your screen.
This one here allows both Mac and Windows users to easily share their screen and collaborate with each other. To use this tool you need to download the Join.me client. Once downloaded you will be provided with a nine digit code to give to the persons with whom you want to share your screen.
This is a great way to share your web search sessions with others. To start using it you need first to create your channel and you will instantly start sharing your web browsing with others. Those who join your channel can chat with you and also see your actual mouse as you move it on their screens. It is great for tutorials. Here is a video to learn more about Channel.me