SmallMenu is another one which is reasonably good -
http://tillanosoft.com/ce/smenu.html
Though I'm going to check out vBar, as SmallMenu is a pay program if you want it to be accessible from the top taskbar, otherwise you can use the free version and bind it to a hardware button - I don't really like that though.
Switcher Bar is a bit horrible... yuck. It's pixel-doubled (not VGA aware), gets in the way (covers up the program title area), and seems a bit buggy to me. I'll have a look at vBar, it looks quite good. I liked Pocket Plus's way of doing it, but Pocket Plus seems like a bit of a resource hog.