Recently downloaded the AudioBoo app as recommended by Ashley at Teaching Happily Ever After. If you're interested in creating podcasts with your class, this is pretty user-friendly, even for the sometimes-technologically-challenged like myself. You can download the app on iOS or Android or use their website with your laptop at http://audioboo.fm/
You could use this to record and share songs/compositions from music lessons or have the children do oral presentations on any topic, in English or as Gaeilge. Definitely worth checking out.