You run a website or an app? Have one or more systems your customers/community depends on? if something goes wrong and your site is down, we think what matters most is that you are able to communicate clearly and easily with your users: be transparent about the problem, what you do to solve it and when you're or will be back online.
It's called a status page and should be working no matter what happens to your own site and app. And it should be simple. And preferably cheap or free.
Clearstatus at work
We've created ClearStatus to do just that for our own operations at WeeblrPress and Weeblr and it is now open-source and available for all.