What are some alternatives?
When comparing Gihosoft Free Video Joiner and MKVToolnix, you can also consider the following products
Boilsoft Video Joiner - Boilsoft Video Joiner is a powerful video merger to join AVI, MPEG, MPG, VOB, RM/RMVB, 3GP, ASF, WMV, WMA, MP4, MP4A, MKV or FLV files, and so forth.
FFmpeg - Open source multimedia suite for conversion, playback, profiling, and streaming.
gMKVExtractGUI - GUI front-end for mkvinfo and mkvextract CLI tools.
Subler - Subler is a Mac OS X application that opens media containers, allows you to add or remove media...
MKVExtractGUI - This is a GUI frontend for mkvextract from ...
Inviska MKV Extract - Free open-source utility for extracting tracks and other elements from MKV files on Windows, Mac and Linux