Xmind - Xmind is a brainstorming and mind mapping application.

Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

MyGuitarTuner.com - Online microphone tuner for guitar, ukulele, violin and other instruments. Tune by ear or using the microphone of your device. It's fast and accurate algorithm makes it one of the best online microphone tuners available.

Coggle - Coggle is a simple, beautiful, powerful way of structuring information.

Metronomus - Powerful and beautiful online metronome