Available for Windows, Mac, Linux, and newer Chromebooks, it treats you to most of the features found in for-pay video editing software: multiple tracks, titling, trimming, slicing, effects, animations, and more. It sports a simple interface as well, which is a huge plus. For quick trims and cuts, the free, excellent, and web-based Online Video Cutter does as its name suggests.
Link: 10 fabulous free apps for working with audio, video, and images
via http://www.fastcompany.com