Skype is well known software ever for voice and video chat using Internet connection in no cost.
Skype owned by Microsoft and initially released on August 2003 written by the developers who previously developed KaZaA.
Skype app for Android provides Skype-to-Skype free voice and video calling using your Android phone’s front or rear-facing camera. Actually rear-facing camera can be used in Android 2.3 on higher versions due to Android restrictions. You can call to any Skype contact that is online no matter it is form Android, iPhone or from PC.
Android Skype App uses 3G or WiFi Internet connection. They recommend to use unlimited data connection package of Internet.
You can also send pictures, videos, and any file to your contacts. Skype provides facility to login using your Microsoft account and you can see both Skype and Microsoft contact at one place. In calling, Skype gives you height quality audio output.
Skype allow you to call and send SMS to non-Skype contacts in cheap price. For example you can send SMS to a cell phone or call to cell or landlines but it is for premium users :)
Now you can send recorded video messages to friends while they are not online. This is a great feature that allows you to send up to 20 videos for free and more for premium users.
Many users that are using this app on iPod are facing more battery consumption. On Galaxy S3 it starts ringing with talking with people :p Mostly people are facing crash problem while using Skype, force to restart and stability problem. However people likes its IM.
Friends if you have any experience with Skype for Android, Please share in comments, Thanks :)