My favorite bluegill/bass "popper" is Sam's One Bug which can be found in the FOTW archives. It cannot be considered a "popper" since it is just round foam, but, it can be twitched if you feel you need to impart any action to it. From my experience with it, you just need to cast it out and let it float along and it will be "hammered" by the bluegill/bass.

It is a very easy fly to tie up and it is a great producer of fish. I use the 1/4" foam for the bluegill on a number 8 or 10 hook and larger foam on larger hooks if I want to target bass only. I do catch a fair share of bass on the one tied for bluegill. I find that yellow is the best producer for me.

If you are looking for a surface lure for bluegill/bass that is very easy to tie, than Sam's One Bug is the one you need plus it is very durable and will take a lot of abuse.