I came across these apps from a Company called PureGaming.org. Each app claims to have a complete list of all games for each system (US/EU/JP) with covershots, info, price info and what appears to be direct (relative) links to ebay and Youtube.
Now I checked the apps and they have been updated/improved a bunch of times so it doesn't appear to be some guy going for a quick cash grab.

Now each App costs 2.99 EUR (should be 3.99 US). Has anyone of you distinguished retrogamers had the pleasure of purchasing any of these apps and if so what might your comments be?