1)   Agile MP4 Video Joiner 2.3.1
Agile MP4 Video Joiner is the most popular video tool that join AVI/MPEG/MP4/MPG/WMV/ASF/MOV... videos to a large one such as MP4/MPEG-4/iPod/iPhone/PSP/Zune.... It merges multiple videos of different formats and supports so many output formats.

 2)   AimOne MP4 Cutter & Joiner 1.01
AimOne MP4 Cutter & Joiner is a powerful mp4 edit tool, with it, you can split/cut mp4 video/audio into smaller one without re-encode; also you can join mulitple mp4 video/audio files into one "non-stop" file.