I'm looking for a program that can analyze the volume on various videos and then make them all the same and a program that can join them without quality loss. I've tried a lot of free ones but they never worked. Price doesn't matter.
I use Sony Vegas Studio and it's 100 bucks, does many things like his big brother Vegas Pro. It recognizes many modern/HD/HQ files too, so you may work with the hi-quality projects. Of course there are many applications but I prefer Sony Vegas.