An app I’ve come to rely heavily on: FastScripts, for instant system-wide access to handy scripts using keyboard shortcuts. Example: I have scripts that will wrap selected text in simple HTML markup (like
<em>this</em>), which is handy in many different apps that don't have any native ability to do that… but using FastScripts, I can use the same keyboard shortcut no matter where I'm working. Really great.
Several months later: this is easily passing the test of time. Although there’s only about a half dozen scripts I invoke this way, I do it constantly, dozens of times per day, if not hundreds.