Tip of My Tongue is one of those little online tools that is insanely helpful when you need a word but you can't remember exactly what it is. You feed it what you can remember: letters, partial fragments of the word, the meaning, what it sounds like etc., and it searches for word matches and produces a list of possibilities.
My guy and I were on a walk the other night and we passed a palm tree I thought was lovely -- but neither of us could remember the proper name of it. All we had was "sa-something." When we got home I fed the letters and meaning (palm tree) to TMT, and got this:
It was a sabal palm, as the TMT correctly guessed on the first run. When you're writing there is nothing more annoying than being unable to remember a word exactly, so this online tool can serve as a very helpful search and rescue for your brain.