Tinderbox Mail
It’s sometimes easy (and useful) to have your Tinderbox documents send you email messages and reminders. There’s a good tutorial and example on the subject. But the tutorial assumes that you’re connected to the net; what if you want to queue mail to send later (e.g. after the airplane lands)?
Rob Forsyth posed this question on the Tinderbox Forum, and the answer was not far to seek: a simple Applescript lets Tinderbox compose messages that sit in Mail.app’s outbox until you’re ready to send them.