Mic test is a free tool with a user friendly interface. It is absolutely free of cost. All you have to do is browse to the website and click on the mic to test any inbuilt or external microphone.
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.
Cyclr - Powerful SaaS integration toolkit for SaaS developers - create, amplify, manage and publish native integrations from within your app with Cyclr's flexible Embedded iPaaS.
Audio Editor Tool - Audio Editor Tool enables you to make high-profile changes to your audio and music files.