General MIDI Player 4+

If your MIDI keyboard has no internal sounds, this is perfect!

This is brilliant! Exactly what I was looking for - a simple sound source that I can quickly fire up and immediately start making sounds from my midi keyboard controller that has no internal sounds. In the past I’ve bought hardware sound modules and sound cards, such as the Roland Sound Canvas or Korg NX5R with Yamaha MIDI XG compatibility. It’s amazing that this app allows you to play all these sounds from an attractive and simple to use interface at a mere fraction of the cost. It was always frustrating having to wait to load up Cubase and insert a plugin instrument before I could 'tinkle the ivories.’ This loads up in a split second, and you’re off playing! :)