Windows app store is growing slowly in comparison of Apple and Android app Store, By September 2013 there are 115000+ apps in it. Windows 8 has lack of apps in comparison of all other major platforms. Microsoft is promoting developers for developing more apps. We all want more in less paid. If Windows will be able to bring all in one solution for mobile, tablet and computer platform, then it would be best option for us.
Here are some of smooth running and high quality free windows 8 apps for PC
Evernote
MetroTube
Netflix
Pinball FX2
Halo: Spartan Assault Lite
PhotoFunia
Bamboo Page
There are many more free windows 8 apps for PC which you will already enjoying. You can share them in below comments. Ask me if you have any query about above listed apps.