Here are just a few that I usually use and have pretty good results Total Video Converter - Somewhat Multi-Purpose Xilisoft Video Converter 3 - Multi-Purpose [Overall Good Quality] WinAVI - Multi-Purpose [Overall Good Quality] VSO.ConvertXToDVD.v2.1.14.223 - For converting to DVD only [Good Quality] Post other ones you use as well
SUPER is probably the best free converter as it does pretty much anything to anything however it's quality isn't the best, same with most of these "simple" converters (ConvertX, WinAVI etc). For quality, you really want to use Main Concept Encoder and do several passes. The payoff however is that it's very long winded and takes a lot of practice as there's so many options/variables and the interface isn't friendly at all.
i use only superavconverter is very complete for me, you can get it from this post. [HIDE]http://www.dramasian.com/forum/showthread.php?t=15513[/HIDE]