Cutt.ly - Free custom URL Shortener and branded URLs with advanced links tracking and Link Management Platform & API.
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.
Rebrandly - Rebrandly is the easiest way to create, share and manage branded links.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Hash-n-slash - A concept for Sentence based URLs
Better Uptime - We call you when your website goes down