Vyew is a web-based conferencing and always-on collaboration platform that provides instant visual communication without the need for client downloads or installations.
Gliffy.com is free web based diagram software. Create and share flowcharts, network diagrams, floorplans, user interface designs and other drawings online with the Gliffy diagram editor.
Twiddla is a free, no-setup, web-based meeting playground. Mark up websites, graphics, and photos, or start brainstorming on a blank canvas. Voice and Text chat too!
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