If you are looking for a set of free video and dvd utilities then you should take a look at this site. http://dvdvideosoft.com
I tried its Free Video Dub and found it a very efficient and little program for quick cuts of video files. It is so simple to use that you cannot go wrong. It is not a feature filled utility but it does what it does very well.
It cannot be compared to Avidemux in terms of features and sophistication. There is no way to convert one video format to another, nor is there a way to add transitions to make cuts and joins subtle. But if you want to shorten a video by taking out parts of it, whether it is at the beginning, or the end or somewhere in the middle, then this is the program to look at first.