poof! is a simple, secure, time-constrained, one-time password sharing service, so you don't email/IM passwords to colleagues/friends/family.
There's a lot more technical detail on Github and the source code is really small, so as to be auditable.
What is this and why should I use/trust it?
Have a look at the FAQs and decide for yourself.
Share a secret
Visiting the URL will not burn it, but clicking the reveal button on the linked page will.