Download FileHide : Hide/Show files on your mobile device. Look at the user generated compatibility list to see if it will work on your phone. 

Download SuperTuner : Tune any musical instrument using this program. A must for a travelling musician.  Look at the user generated compatibility list to see if it will work on your phone. 
  
Download Tanpura : A must for an Indian Classical Music performer. Produces  Sruti (drone) like a tanpura / Srutibox. Look at the user generated compatibility list to see if it will work on your phone.