I only have a partial answer. You may not get everything you want in one place (at least not for free). A good converter that handles lots of formats is Super. When I did editing (e.g. adding titles) I used Windows MovieMaker. As for the watermarks, I'm sure that you can find that doing a search.
chrishea 182 Nearly a Posting Virtuoso
chrishea 182 Nearly a Posting Virtuoso
chrishea 182 Nearly a Posting Virtuoso
chrishea 182 Nearly a Posting Virtuoso
chrishea 182 Nearly a Posting Virtuoso
chrishea 182 Nearly a Posting Virtuoso
chrishea 182 Nearly a Posting Virtuoso