ExtendsClass's unzip allows to Unzip .zip files, Unrar .rar files and Untar .tar files online. The files are not sent to the server side. There is no limit.
ezyZip - ezyZip is a file compression tool that lets you zip files into an archive.
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.
Zipeg - Zipeg is free application for opening ZIP and RAR files on Mac and Windows.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Archive Extractor - Archive Extractor is an online archive extractor that allows you to extract and save the content of compressed archives directly from your browser.
Better Uptime - We call you when your website goes down