1)   Kate's Video Joiner - free beta 1.68
Joins multiple videos of same or different format and save it as single video. Supports AVI, WMV, MOV , DIVX, ASF, 3GP, MP4, MPEG1, MPEG2, VCD-PAL ,VCD-NTSC, SVCD-PAL, SVCD-NTSC, DVD-PAL, DVD-NTSC and other formats.