Open Source Apps for Windows

https://help.ubuntu.com/community/ListOfOpenSourcePrograms

List Of Open-source Programs (LOOP) for Microsoft Windows Operating Systems

What is the LOOP list?

This is a list of the best open-source applications that run on Windows. Feel free to edit this list and add any programs that meet the criteria below. The purpose of this list is to demonstrate the quality of open-source applications and advocate the open source software development model.

Free Video Editor – Avidemux

http://fixounet.free.fr/avidemux/

Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs. Tasks can be automated using projects, job queue and powerful scripting capabilities.
Avidemux is available for Linux, BSD, Mac OS X and Microsoft Windows under the GNU GPL license.