I'm afraid this thread's going to be rather Windows-centric, as I don't use iOS or Linux. Personally, I use Media Player Classic – Home Cinema. I've found it's the best media player because it's very lightweight and plays almost any format. I used to use VLC media player, though. What about you? edit — I forgot about music. I use foobar2000 for music playback and Winamp for editing ID3 tags (it's got the best interface for it, I think). I use iTunes if I'm changing out what's on my iPod, though.