Google Duo is a simple 1-to-1 video calling app for Android and iOS. Duo takes the complexity out of video calling, so that you can be together in the moment wherever you are.

There would be a bunch of popular instant-messengers out there which we can name without taking a breath, however majority of them can be and are getting snooped into by governmental agencies and hackers. Free, Multi-platform and open-sourced Tox instant-messenger aims to solve this by providing an easy to use method to connect with friends and family without anyone else listening-in. Users can not only enjoy secure and encrypted instant-chats but also voice and video calls without the fear of anybody listening into it, also unlike other big-name services which require you to pay for additional features, Tox is totally free, and comes without advertising.

Free calling vouchers and discount coupons for Skype are hugely popular, and here is something any VOIP user wont like to miss - a full-month of unlimited calls across the globe on Skype for just $1 verification charge.

The limited period offer from Skype allows users to receive unlimited calling free for an entire month, so apart from free Skype to Skype calls, you can also call offline contacts on their mobiles and landlines anywhere in the world (well, most of them).

The offer requires users to verify a credit-card charge of $1 and is applicable to a fair usage policy, users can make free Calls to mobiles and landlines in these countries: Canada, Guam, HongKong S.A.R. China, Puerto Rico, Singapore, Thailand and United States and land-line calls to these countries: Argentina, Australia, Austria, Belgium, Chile, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Israel, Italy, Japan, South Korea, Luxembourg, Malaysia, Netherlands, New Zealand, Norway, Poland, Portugal, Russia (Moscow and St. Petersburg only), Slovakia, Spain, Sweden, Switzerland, Taiwan, United Kingdom and Venezuela.

Kaspersky is giving away free license of their "Kaspersky Mobile Security 9" mobile protection suite to celebrate Football Worldcup 2010 and now Skype has joined the celebration offering a full month of free calls to USA, UK and 30 other countries.

It's official now Skype for iPhone is now announced at CTIA 2009 and will be available for download in iTunes App Store from tomorrow, Skype for iPhone will let users call other Skype users for free while landlines calls will be charged as per existing Skype rates, unluckily you won't be able to use 3G or cellular data channel for VOIP and will need an active Wi-Fi signal to make use of the service, however chatting will remain functional without the need of Wi-fi over your cellular network.

This is some very good news for iPod Touch users as they can now make calls using an earphone with embedded microphone bridging the phone functionality gap between the iPhone and iPod Touch to some extent.

Skype is one of the most popular VOIP service provider, allowing users to make free Skype to Skype calls, however calls to fixed phones and cellphones is chargeable, but now you have a chance to get 30 minutes of free SkyOut credit by simply participating in a short survey that won't take more then a minute to complete.

A new threat named "Warezov Trojan horse" has hit the leading VOIP service provider Skype, the target Skype user receives a message stating "Check up this" and a link to the infected file "file_01.exe" with the Trojan payload, once a user is fooled into downloading this malicious file more files are downloaded automatically and installed. The infected computer now acts as the propagator and all their contacts are sent the same message to spread the Trojan.