Compare and Search all App Stores

So many app stores have cropped up,  its hard to keep the straight.  Consumer beware, they are not created equal.

Search ALL app stores in one place, with box below:
(example Facebook)

Loading

iTunes App Store - Apple
Largest selection of apps, supports iOS only.  Site is not web friendly, favors iTunes app.

Sample:

Facebook: Yes
Skype: Yes
Teamspeak: Yes
VNC Utility: Yes
Plants vs Zombies: Yes
Children's section: Yes, Family & Kids

Google Play - Google
Formerly known as Google Market.  Services some Android devices.

Sample:
Facebook: Yes
Skype: Yes
Teamspeak: Yes
VNC Utility: Yes
Plants vs Zombies: Yes
Children's section: No, Education only

App World - Blackberry
Sales for Blackberry devices have been low.  The result is low support for apps.

Sample:
Facebook: Yes
Skype: No
Teamspeak: No
VNC Utility: Yes
Plants vs Zombies: Yes
Children's section: No, education only

Windows Marketplace - Microsoft
Really not much right now, since Metro never picked up.  Windows Marketplace will gain momentum after the release of  Windows 8.

Sample:
Facebook: Yes
Skype: No
Teamspeak: No
VNC Utility: Yes
Plants vs Zombies: Yes
Children's section: Yes, Kids and Family

 AppsLib Marketplace - APPSLIB Ltd
Many cheaper tablets are bound to the AppsLib Marketplace, instead of Google's Android Market.  Don't expect to find much, and consumer should beware that not all Android devices can easily use android apps.

Sample:
I couldn't do a search on their site, really hard to navigate.
Skype: Yes

Cydia Store  - saurik
For Jailbroken iOS.  Did Apple block a cool app for whatever reason? Try this store.