Windows Phone developers Liquid Daffodil are back at making Windows Phone fans excited with their legion of apps including Cowlick! glƏƏk!, Cumulotweetus and Outsider. The latest one is called Locksider and we think Windows Phone 8 users are going to be excited.

Locksider is an app many people have been looking for: an automatic Lock screen wallpaper changer, offering high quality images updated on a regular basis. The app features numerous categories that you can choose from to suit your taste and the user has control on how often it should update your lock screen from once an hour to once a day. Don’t want it to update at all but instead do it manually? You can do that as well by browsing through categories and force updating the lock screen image of your choosing.

The app has been submitted to the Store and should be available this week—we’ll keep you posted. So far, it’s working very well on our device and it looks great.

The app is part of a new initiative by Liquid Daffodil called ‘Free 4 Fans’ (F4F) and works like this:

“Liquid Daffodil is in the process of developing eight (8) clean, cool, useful (or just fun and original) apps and tools apps (the first 3 are already complete) that will be competitively priced in the Windows Phone Store, and available to anyone for purchase, but FREE for die-hard users of specific Liquid Daffodil apps. As you may know, our venture into the Windows Phone world began with …I’m a WP7!, now Outsider, and users of the app accumulate “Cutter” through activity, forum participation, unlocking of Easter Eggs, etc. in the app. We are now letting users “buy” apps will their accumulated Cutter!”

Indeed, that is a neat way to thank your audience and if Locksider is any indication, those other 7 apps that are coming down the pike should be some picker uppers.

We’ll let you know when Locksider goes live in the Windows Phone Store. It will fetch for $0.99 or 5000 Cutter points. For now, you can watch our teaser video to see what it’s all about!