I did not see one of these mentioned but these are truly a life saver for hard to get to places and some not so hard to get places.
Fein Multimaster
MultiMaster - C. & E. FEIN GmbH
It is on average the first tool I get out and the last tool I put away.
I am sure some of you have seen these but they truly are great. I have had mine for 10 years. The patent ran out about 3 years ago so you can get copies from other manufacturers but I just use the original and love it!!
Also the medical version is all stainless and you have probably seen one if you had a cast removed!