Weeny Free Video Joiner is a free tool that helps make a large video file by combining multiple video files of different formats. You can choose the extension for the output file, preview media, and alter video and audio parameters. The tool is easy to set up, and the simple interface ensures you don’t take much time trying to figure out the various features. Not to mention, the tool works with different file formats, including WMV, AVI, MP4, ASF, 3GP, AMV and MKV clips.