Free software that lets you ...

backup a DVD : DVD Backup Xpress

capture screen activity into a movie : AviScreen Classic

convert DVD to DIVx : AutoGK

copy a DVD : Shrinkto5

copy/shrink a DVD to the hard drive : DVD Shrink

edit an avi file : AviTricks Video Editor Classic (Freeware)

identify missing codecs for playing avi file GSpot Codec Information Appliance

join two mpg files : CombiMovie

split/join avi files : AviSplit Classic

convert your DVD's to VCD, XVCD. SVCD and XSVCD: EazyVCD

copy a DVD (full working 3 day trial)- DVD neXt COPY

copy a DVD - SC DVD copier

rip and burn a DVD - SC DVD ripper & burner

download the XviD codec or DivX codec

extract audio from DVD's (fully functional 30 day trial) - DVD Audio extractor

convert 3GP (mobilephone video) to AVI - Mobile3GPconverter

convert AVI, WMV, DV files in all combinations - STOIK Video Converter

copy any DVD video on to your DVD disc or hard drive (7 day trial) - Easy DVD-Video Copy

free CD/DVD burning software - CDBurnerXP Pro

burn a CD or DVD (fully functional 30 day trial) - Burn My Files