You're quite welcome, vinoth, and welcome to the forums, by the way.
I've only had my PE for a few days, so I'm learning here just like everyone else.
Start by reading the 'stickies' in this forum ... a good one on apps and their installation, etc. can be found here:
https://www.mobileread.com/forums/sho...d.php?t=132878
Then, if you have problems with a particular app or anything else concerning the device, please post a new thread and one of our really knowledgeable eDGe owners will be along to make suggestions.
I don't have any personal experience with skype or facebook apps...many here do, though. I've only installed the Amazon app store and a few other apps from links supplied here in the forum (browser, ereader software, etc.).
Enjoy your eDGe!!