Windows 7 has a built-in wallpaper changer, when selecting the wallpaper just select a few and choose the delay
I have over 100 bike,quad pictures rotating but just screenshot'd one
I used to use a program that allows different wallpapers, and also put a taskbar on each screen, which displayed only the programs open and on that screen.
yay! but I don't have a premium atm, that's why I use now RDesc hehehe
I used many years (but many many hahaha) Winamp but since I discovered AIMP2 I stopped using it, at first I had trouble using it because Winamp is quite different but is very very good.