How to download android applications for free ?

How to download android applications for free ?
I already have the applanet and 4shared applications on my android phone. Plz tell me if you know any other applications/ good ways to download these apps

ultimate photo sharing app

You can download from google play.

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Below I have given some links from where you can download free android apps, themes , games.
1/ play.google.com
2/ appbrain.com
3/ http://www.freeandroidapps1.com
4/ getandroidstuff.com
5/ freeandroidwares.net



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