Drupe - Next generation contact manager and dialer.
Quonference - Highly secure conferencing with advanced access control
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Xpra - multi-platform screen and application forwarding system
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Net Meeting - Net Meeting provides a free solution for web conferencing, audio and video conferencing.