ImTOO Movie Maker can help you merge movie clips. The application has an easy-to-use interface, in which the most important element is the timeline. You can easily import files either individually or as complete folders, and re-order them according to your needs. Although multiple video formats are supported, it does not allow you to import audio or picture files.
When you have finished arranging the input clips and setting transitions between them, you can simply export the results to any of the multiple output profiles available. These presets have been conveniently organized, either by base formats or supporting devices. In case no available profile meets your exact needs, you can customize one of them and even save it with a new name.
Rather than a movie editor, as you may think at first, ImTOO Movie Maker is just a video merger with very limited editing features. For example, it does not allow you to extract a segment from a clip, add captions or edit the sound track independently of the video track. I should tell you that you could even find more features in many of the free applications available.