I think Winavi will do that. You can go to videohelp.com and look on the left under "Tools". There is a pick list that lets you choose what format you want to convert from and too and it'll tell you what tools have that capability.
For rmvb you need codec and also for divx. If you like winavi,you can go to its web: http://www.winavi.com/rm-converter.htm maybe helpful
Yes there are a couple: http://www.videohelp.com/tools?tool...Name&hits=50&convert=RM+to&dvdauthorfeatures= I haven't tried the free stuff, though SUPER is highly regarded.