just saw your post about asking for something free similar to webex, check out teamviewer
http://www.teamviewer.com/index.aspx
http://www.teamviewer.com/index.aspx
Discover new ways to elevate your game with the updated DGCourseReview app!
It's entirely free and enhanced with features shaped by user feedback to ensure your best experience on the course. (App Store or Google Play)