For those with modest text-editing needs, Apple's TextEdit is a great choice. Did you know that it's got an autocomplete option? David Mendels points out how it works at Mac OS X Hints.
As you're typing a long word, hit the escape key. A popup window will appear with a list of guesses. Use the arrow keys to find the word you want and hit enter to select. To shorten the list, keep typing. To abandon the list entirely, hit escape again to put it away.
That's a nice little tip! Thanks, David.
[Via Minimal Mac]