Extensoft’s Free Video Converter is a nice example of the genre. There are a load of these programs on the market, but I like the interface and speed of this one in particular. I also like the fact that you can combine multiple clips together in a rudimentary fashion (e.g. no transitions etc) and make a longer length movie out of clips. Great for your different digital camera footage bits. Oh, and it also creates nice web Flash video code for uploading to a web server. Nice and definitely worth a download.
The Free Video Converter allows you to convert, split, merge and edit your movie files. It supports wide variety of video formats from AVI to Flash (FLV) and high-definition movies (MTS) captured with new HD cameras. The simple and intuitive interface makes it easy to perform basic conversion tasks, while supporting additional features like joining and splitting movie clips, and batch conversion for converting multiple movies in one step.