Windows/Mac/Linux: If you're looking for a great audio editor, our favourite is Audacity. If you're looking for something a little faster and trimmer that's a little more approachable, Ocenaudio is worth checking out. It's free, flexible and cross platform.
Ocenaudio isn't trying to replace Audacity -- or any other feature-packed audio editor, for that matter. Instead, the app is aimed at people who need something a little faster and lightweight, and don't need all of the bells and whistles that some editing tools require. If you're just trimming the ends off of a podcast recording, recording a mix to your laptop from another device, or digitising CDs or cassettes, this is a simple, one-click editor that records from input sources and gives you control over what how finished product sounds and is encoded.
It supports multiple audio files and tracks, with huge waveform displays on the right side of the window so you can see what you're in for. You can even select multiple audio files or sections at once, preview those selections, or edit them all at once. You can even apply effects like flange, delay or reverb, if you want to add a little post production to your mixes or recordings. Best of all, the app is completely free. Hit the link below to give it a try.