for encoding i would say the 3ivx filters, nero recode, propably videolan (didnt test it tough), maybe the mpegable tool too (as its also dshow based afaik) than there are the two mencoder based tools (from doom9 and mezzanine), mencoder with the new libavformat patch might also output asp-in-mp4 relatively correctly from .avs, but surely no correct mp4 with avc i already plan to clean up the list, eg split in muxing, encoding, editing tools etc and add some, just didnt find the time