avidemux

Not ideal, but it is free and sometimes useful editing videos, appending one video to another and making from many videos one video with MP4 format.

a good open source project

One of my favorite free applications period! Considering it is free this app is amazingly valuable. I love how simple and intuitive it is. I don't use it to do the "serious" video editing work but there are so many times I need to tweak/trim/cut some footage and don't have the time to go through all the setup/exporting that premiere or final cut require. Thanks for working on this. One thing that I think would make it even better is if it'd be possible to make a free custom keyboard shortcuts / keybindings. I often want to just change which key makes an in/out point or some of those other often used funtions.

thanks thought this was an editor but will use for mixing down renders thanks

I have used Avidemux on osx for 5 years and I love it!