I use the Harbor Freight corded oscillating tool. It's not a tool that gets a lot of use so I bought the cheapest version of it. Works well when I need it.
I've also used the corded Dremel version of the tool and there wasn't much difference between the Dremel and the HF in terms of getting the job done. The one thing I noticed was that the Dremel got really hot on extended use - so hot I couldn't hold it normally.
Go into the world and do well. But more importantly, go into the world and do good.