GTmetrix - GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
PageSpeed Insights - PageSpeed is addon for ...
UptimeRobot - Free Website Uptime Monitoring
WebPagetest - Run a free website speed test from multiple locations around the globe using real browsers...
UptimeRobot App - Web, SSL, ports & Cron-jobs monitoring