Marketplace Dashboard for Windows Phone 8 is an app designed to help developers keep track of the apps and games they have in the Windows Phone Store. The app gives you a view of your apps including crash count, submission status and download counts.
Marketplace Dashboard has main pages that will list your published works and a page for those apps/games still in the certification process. The paid, version of Marketplace Dashboard, which is currently on sale, allows each app to be pinned to your Start Screen that will display app stats.
The developer notes that since there is no public Windows Phone Store API, Marketplace Dashboard relies on screen scraping for much of the data it delivers. Future updates hope to add reviews and in-app purchasing details from the Store.
The app is currently on sale for $.99 for a limited time (not sure how long "limited" is). So if you're a developer looking for a simple way to monitor you Windows Phone apps and games, Marketplace Dashboard might be worth looking into. There is a trial version that is ad supported in case you want to dip your toe in the water before buying.
You can find Marketplace Dashboard here in the Windows Phone Store.