One of the things that really pissed me off about BlackBerry 10 is the inability to download apps OTA requiring you to sideload them. This makes beta testing a pain in the arse though it is still possible. Keeper has been offering his apps as betas for sideloading before launch for awhile now and he has done just that with Photo X Pro and Music X. Photo X Pro is a very slick photo viewer and editor for BlackBerry 10 with some nice sharing features. Music X on the other hand allows you set a sleep timer on the music player to shutoff after a certain interval.
Check them both out in the forums: