Tango Video Calls - Tango allows you to make free phone calls and free video calls over 3G, 4G, and Wi-Fi. Make calls to any other person who has Tango installed on their PC, mobile phone or tablet. Start a Tango call with just voice, and easily move into a video call when you have something to share. It's easy to use, it's fun, and it works
Cisco WebEx Meetings - It's easy to stay connected to important meetings, wherever you are.
With WebEx, you can join any web conference right from your iPhone and iPad.
Experience WebEx High Quality 2-way video on the iPad 2 and iPhone 4 by viewing the video feeds of the participants in the web conference and streaming your own video back to them
Cisco Unified Mobile Communicator - Cisco Mobile complements your iPhone by providing mobile access to your office phone system. No matter where you are, you can use Cisco Mobile to join meetings, answer business calls, and listen to your work voice messages
VidyoMobile - delivers up to full HD business grade point-to-point and multipoint video conferencing to your iPhone, iPod or iPad device when connected to your enterprise or service provider's Vidyo infrastructure.
Experience telepresence quality conferencing with shared content viewing on the move with VidyoMobile
goober VoIP - allows you to make cheap international calls to mobile phones and landlines. For 40 countries, the first two minutes of every conversation are free. After the call, the cost for those two minutes will be credited to your account.
For more savings, you can use flatrates
Cisco Jabber - Cisco Jabber turns your iPhone into a full-featured Cisco Unified IP Phone, allowing you to place, receive, and manage calls using your workplace's telephony infrastructure
Firetalk - allows you to make free calls to USA, Canada and UK, and cheap calls to lots of destinations around the world. New users will receive a $1 dollar credit, to call worldwide.
Firetalk lets you make & receive calls and message other Firetalk users for free
Talk Out Mobile VoIP for iPhone - Call and video chat with your Talk Out Mobile friends for free. Make cheap local or international calls to non-members
myDialBox for iPhone - myDialBox allows you to make phone calls worldwide with reasonable pricing plans. You receive $1 balance as a free gift to start.
myDialBox supports WiFi, 3G, and EDGE connections so you can call your family and friends from anywhere
