For simplicity and a good number of features I like the video editor that comes with the full version of Nero (commercial non-free).
The full version of Nero is also an excellent CD/DVD burning program. Unfortunately they also bundle several other programs that are less good, but if you are careful with the installer there is an option in the set-up (choose “custom set-up”) to leave out most of the other programs. I don’t think that you can leave out “Nero Scout” but can be easily disabled.