ShowDocumet is Free, No Registration required, instantaneous Web Meeting, Document Sharing web based service. Absolutely, light weight, lightning fast service that offers a lot of features;
Online document sharing
Interactive Whiteboard, Drawing tools, Text editor, chat
Watch YouTube, Google Map together
Sharing Google Doc files
Easy Skype integration to talk during sessions…
Interactive Whiteboard is very useful during meeting.
Interactive YouTube Video Watch is also interesting. You can watch YouTube videos with friends together!
Collaboratively watch Google Maps!
Very interesting and nice web service that will enhance your online collaboration!