Internetvista availability check is a website uptime checker that also tests your website response time and average speed from ten locations.
Website Availability Test by Uptimia
Uptimia' Website Availability Test is an online tool to check your website availability from 30 different checkpoints on 6 continents. Plus, it also checks page loading time from those different locations.
Uptime Checker by IsItWP
IsItWP Uptime Checker is a simple availability tester of any website that helps you see if the website is down for you or everyone.
Website Availability Check by site24x7
This service by site24x7 tests your website's availability and performance from 60+ locations worldwide and make sure your visitors can access it.