question on vid joiner

Anyone know of a good video joiner program? Preferably one that works on multiple file types and doesn't give a hit to quality?

Getting kinda tired of uploading 3 parts of a movie that are 120mb each and having to split em into a total of 6 files for people to dl. It's a hassle for me and dl'ers.

Thanks much.

I use the Mac version of this:
http://www.squared5.com/

it is free and Mac version works well. Do not know about Windows version but perhaps you can try.

Serveral proggies can do the job. For wmv files use asftools, for mpeg use CombiMovie (MxTools) and for avi files use VirtualDub.

MediaCoder, an amazing all-in-one freeware (open source) encoder, has the option to join the files.
http://mediacoder.sourceforge.net/