1) Zen-Light Box
or Fuel Slim box
(personally I like Zen Light box)
There's a good commercial option, by Magictoolbox, google it)

2) Image Manger 1.4
or Image Hander2
(personally i would use Image Manager 1.4, Less automated but if you want your images to be index by google it is the better option. It's also more simple code-wise so less things to go wrong)