This is one of the most complete converter software offered for free. It will convert a video to another format with ease and will customize the settings for the final file. You can do a lot of jobs with one tool. In the left menu you have nice arranged sections for video, audio, picture, CD-ROM device and an advanced tab.
Simply select the final format of file that you want and start browsing on your local folders to add the desired files. You can customize output settings. Click start conversion and in a few seconds you will have the new file.
At the Advanced tab, you have some useful functions like Video Joiner to merge more video files in a single one, Audio Joiner, you can view detailed info about a specific media file.