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.
SideProjectors - Marketplace to buy and sell side projects
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Transferslot - Easily buy and sell side-projects
Better Uptime - We call you when your website goes down
1Kprojects - Neglected side projects for less than $1000.