Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.
DocDroid - DocDroid is a service for sharing document and slides.
FileFlex - FileFlex: Access Share Stream developed and published by Qnext.
SlideShare - Discover, Share, and Present presentations and infographics with the world’s largest professional content sharing community.
Airtime - Hang out with group video, share music & videos
SlideOnline - Share PPT presentations online easily with a free PowerPoint presentation sharing platform