AnotherRSS
By @Jochen Peters
The App AnotherRSS is a free Atom RSS Feed Reader and very similar to ViboraFeed.
mp4parser
By @Umair Adil
Android App to Append Mp4 Videos or Merge Audio files with video files on your Android device.
QRecorder
By @Andrii Serbeniuk
QRecorder - playback capture api implementation with decoding recording from pcm to mp3 format
VKEncodeMusic
Позволяет перекодировать ENCODED-файлы из кэша ВК в MP3 для прослушивания их в стороннем плеере.