Nothing fancy or "cool" at all, but this one is my favorite.
We have a nephew who is mentally retarded, and was in an in-patient facility for awhile. The second Christmas after we were married, he was allowed to leave and spend some time with us. We were decorating the tree, and discovered we didn't have an angel.
So, on the spot, we made this one out of supplies we had on hand (had no $$ to our name either)... a finished TP roll for body, styrofoam ornament ball w/ some strands cut away for face/hair, pin eyes/mouth and bread bag twist-tie halo.
that was 11 years ago, been at the top of the tree ever since. We've been given a "real" angel but this one means more to us.