Recordr - Recordr is an app that allows you to record high-quality audio with your smartphone.
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Easy Microphone - Easy microphone is an app that turns your smartphone into a microphone for those devices that don’t feature a built-in microphone.
TwistedWave - TwistedWave is one of the unique audio editors that allow you to edit your music file online without any installation.
Iriun Webcam - Use your phone's camera as a wireless webcam in your PC or Mac.
FL Studio - Image-Line's FL Studio, now on it's 12th version, is a well-known music production suite and the most popular beat processor on the market, due no doubt to its longevity. Read more about FL Studio.