Dead Man's Switch
beta.deadmansswitch.net
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Bad things happen. Sometimes, they happen to you. If something does happen, you might wish there was something you had told the people around you. How you feel, what you regret, where the money is stashed.For this, you need a dead man's switch.