Last Updated: October 10th, 2010
If you're looking for a small, great-sounding, non-Apple music playing device, two of the most frequently recommended players out there have been the Sansa Fuze and Cowon D2/D2+. With the Fuze just getting bumped up to the Fuze+, it's only fair that Cowon release an update of their own. Although it was only last year that the D2+ was released, a certification filing on the 28th of September shows that there truly is a D3 coming, and hopefully soon.
It has been rumoured for a while that the D3 will run Android, and it seems that Korean blog MovePlayer has received enough insider information to confirm that this will in fact be the case.
Last Updated: August 1st, 2012
The popular, open-source media player firmware Rockbox has recently been made available for Android. Rather than run as an operating system, Rockbox operates as a standalone application that you can install as usual with an APK. Development is still on-going, but Rockbox dev kugel has a few pre-compiled APKs hosted for you to try out if you’re interested.
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These builds are unofficial and are purely for demonstrative purposes, but they seem to work pretty nicely. Currently the navigation/control interaction method is touchscreen only, and screen rotation is not supported - Rockbox will only run in Portrait orientation.