CDBurnerXP is in version 4.x of its life. It is a fully functional CD/DVD burner.
http://cdburnerxp.se/

Although InfraRecorder is still in the beta stage, it is quite functional. I have experienced a few compatibility issues with some hardware and media. It does support the burning of video DVD's.
http://infrarecorder.org/

This one is a little different than the others. ImgBurn is more for working with discs and disc images (ISO files). I mainly use it for going from disc to ISO and vice versa.
http://www.imgburn.com/