For the most part I've never bothered to pay attention to the Scripts menu in any application that has them. It's been my experience that most of the included AppleScripts tend to simply mimick behaviour easier accomplished through keyboard shortcuts and plain ol' typing. But sometimes, just sometimes, a script comes along that makes the Scripts menu absolutely worthwhile.

BBAutoComplete is just that sort of script. It, as the name suggests, adds look-ahead auto-completion to BBEdit (and a host of other applications I don't use - see for yourself).

After installation I gave it a try by typing: spaceman spacestation
then on the next line I typed
spa
and pressed Cmd-/ (the keyboard shortcut for it). Lo and behold, it completed spacestation. Cmd-/ again and it completed spaceman.

Sweet.

(Via Daring Fireball)