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.
Versus - Find popular alternatives to anything in a jiffy
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Kimovil - Compare price, specs, reviews and benchmarks for smartphones and tablets.
Better Uptime - We call you when your website goes down
GSMArena - GSMArena is an online site that offers exhaustive and up and coming cell phone data.