Tuners
TonalEngery Tuner - App ($3.99 for iOS - FREE for Android)
InsTuner - iPhone App (Free)
Metronomes
Pro Metronome - App on Apple AppStore (FREE)
App on Google Play (FREE)
MetronomeOnline - Free website
Fingering Charts
Woodwind Fingering Guides
Fingering Guides for woodwind and brass instruments