Login details are kept in LastPass.
We use uptime pirate to notify us if any of the sites we manage have gone down.
http://uptime-pirate-static.s3-website.eu-west-2.amazonaws.com/
When we have created a new website, or overtake ownership on it, please add the site to Uptime Pirate by entering the URL in the white Add box.
You can also get a list of what plugins, WordPress and PHP versions are being used, along with a list of admin users, by pressing the yellow “Audit” button at the top.