What are some alternatives?
join.me - Instant screen sharing. Instant Aha!
Etherpad - Etherpad is a highly customizable Open Source online editor providing collaborative editing in...
GoToMeeting - GoToMeeting is a web conferencing service offering a range of services which are available on Mac, PC, iOS and Android devices.
PiratePad - Real-time collaborative text-editor. No account required. Edits highlighted in authors color.
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Google Drive - Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.