Find and Run Robot is one of the most powerful apps on the list, with a ton of settings, plugins, and alias capabilities that let you customize a lot of how it works. It's a bit more difficult to set up, since it's so advanced, but it's good if you have very specific needs. It's biggest downside is that it doesn't index at all, which keeps resource usage low but can be slower to find things. Executor lets you choose, which is one of the reasons why it's just the best there is.