Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Vimium - The Hacker's Browser.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
hunt-n-peck - Simple vimium/vimperator style navigation for Windows applications based on the UI Automation...
Better Uptime - We call you when your website goes down
Tridactyl - Replace Firefox's default control mechanism with one modelled on the one true editor, Vim.