Domcomp - No-nonsense domain price comparisons, updated daily
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.
dofo.com - Domain search platform Dofo.com gathers all registered (350 million) domains of the world in a single place. Dofo also brings together all the domain names that are on sale, provides useful features, all completely free.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Pricepeek - Compare prices of the same product across all Amazon locales
Better Uptime - We call you when your website goes down