Tango, the leading all-in-one social networking app, enables you to connect with friends and stay closer to family in a way that is easy, spontaneous, fun and fits the moment. Tango allows you to send free text messages, play games, and make free phone calls and video calls with those you care about. Tango works on iPhones, iPod touch, hundreds of Android phones and Windows Phone devices, as well as tablets and PCs, and provides high quality experience over 3G, 4G, and Wi-Fi.  More than 145 million people in 212 countries already love using the service.

Founded in September 2009, Tango has raised over $87M from leading venture capital firms and top individual investors.  Tango is based in Mountain View, California.

Camfrog Video Chat allows you to join real streaming video chat rooms where you can hear, see, and chat with many people at a time. It is videoconferencing software works behind most firewalls and routers. Camfrog Video Chat allows multi-user videoconferencing where you can join a room with up to 1000 users and just click a user name to begin seeing someone. Press the 'talk' button to talk to the entire room with audio. The video chat rooms are hosted by broadband users who are running the Camfrog Video Chat Room Server software so any user can set up their own multi-user video conference for other users to join.

Nimbuzz is a free call and messaging app for the connected generation. Nimbuzz combines the powers of the Internet and mobile communications into one, and lets you make calls, send messages and share files, on any mobile device, for free.

Nimbuzz is the best free instant messenger (IM) for your Windows PC, Mac or mobile phone. Download our free PC or mobile instant messenger (IM) for easy PC or mobile messenger chat.

Make free PC to mobile phone international VoIP calls to your friends on Nimbuzz. Use NimbuzzOut to make PC to mobile cheap VoIP international calls to your friends, anywhere in the world.

Nimbuzz Lets You- Meet, Share and Connect. It’s mobile freedom to communicate!

Chat with friends.

We make it easy for you to video chat through multiple IM networks like Skype® and Google® Hangouts.

Meet new people.

Make connections with people just like you through ChatRoulette® and other chat communities.

Watch live webcams.

Stay informed with live news, entertainment events, blogs and more.

Windows Live Messenger makes it easier than ever to stay connected to the people you care about.

Favorites and groups - Put the people you chat with most at the top of your contacts, so you easily see when they're online. Want to chat with several people in one window? Just set up a group.

Share photos - Look at photos together, right in the conversation window. And Messenger tells you when people you know post new photos on Windows Live.

Customize - Show off your personal style with custom scenes, animated display pictures, and signature sounds.

Mobile and web - Using a public computer without Messenger? No problem! You can chat on the web from Windows Live Hotmail. Or, use Messenger on your mobile phone.

Get Messenger and stay in touch.

The Google Talk downloadable application for Windows offers many features for communicating with your friends and family.

Instant messaging - Chat with all of your Google Talk and Gmail contacts in real time.

Free PC-to-PC voice chat - You can talk to anyone else for free who's online and has the Google Talk client.

Send and receive voicemails - If the person you're calling isn't available, you can leave a voicemail.

Unlimited file transfers - Send files to your contacts. There are no file size or bandwidth restrictions.

Gmail notifications on your desktop - When you're signed into Google Talk, you'll be notified of new messages in your Gmail inbox.

Features :

*Easily find or invite friends from other services to come chat with you

*Now you can chat with high quality full-screen video.

*Make free PC-to-PC calls and PC-to-phone calls for as low as 1¢ a minute (plus free voicemail!)

*Send text messages (SMS) to friends' mobile phones for free*

*Instant message with one friend, or conference in a bunch

*Show your style with emoticons, Avatars, audibles and IMVironments

*Use the built-in media player to watch web videos and view photos with friends

*Easy access to your conversation history from any device

Messenger for Windows

Keep up with friends, no matter what you're doing.

Chat while you do other stuff

See and respond to chats right from your desktop. Whether you're browsing other websites or using another app, you don't have to click away to stay connected.

Get notified instantly

Find out about new comments, photo tags and more as soon as they happen.

Skype is software for calling other people on their computers or phones. Download Skype and start calling for free all over the world. 

The calls have excellent sound quality and are highly secure with end-to-end encryption. You don't even need to configure your firewall or router or any other networking gear.

Additionally it doesn't just work on Windows. Skype is also for Mac OS X, Linux and PDAs using Pocket PC, with a native look and feel for each platform. Talking, sending instant messages or even file transfers work between different platforms like a charm.

•Skype calling - Skype has all the features of an ordinary phone so it's even easier to manage your calls.

•Video calling - see who you are talking to at the same time as speaking to them.

•Add Skype and SkypeOut contacts - Add contacts who use Skype and those who use ordinary phones so you can call more people.

•Organising groups - group contacts under certain names and share them with your contacts so they can talk to them too.

•Basic chat and emoticons - when it's not convenient to call, chat or Instant Message (IM) your contacts.

•Group chat - for when it's easier to chat or Instant Message (IM) all your friends at once.

•Profile settings - change how you appear to the world and let people know a bit about you.

•Conference calling - talk to more than one friend at a time.

•Import contacts - search your address book to find friends and family that already have a Skype name and start calling them for free.

•View Outlook contacts - view and call your Microsoft Outlook® contacts quickly and directly from your Skype contact list.

•Quickfilter and Speed-Dial - find Skype contacts, recent chats and SkypeOut contacts quickly and easily, then enter their Skype name to call them back quickly.

 

ooVoo - Free software built using special technologies, allowing users to hold video conferences on the Internet. You can communicate as in "one on one", and with several people simultaneously. In ooVoo you can always see who is online, supported by the record conversations, sending video messages, chat, file transfer.

Video calling ooVoo:

• Free group video calls - up to 12 participants

(video calls with six members are always free)

• Record and send video messages

• Recording and downloading calls on YouTube

• Send video messages to their contacts in ooVoo or Facebook

• Free setup web chat rooms