Today, third-party mobile application store GetJar is publicly launching its GetJar Gold service, which has been in beta testing for the past month. The new service presents a viable challenge to Amazon's Appstore and its time-limited "free app of the day" by offering an entire catalog of premium Android applications for free. The apps are high quality, ad-free and are available for download at any time.

Read More: Watch Out Amazon: GetJar Launches A Full Catalog Of Premium Android Apps For Free