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.
Bulk Image Downloader - With Bulk Image Downloader you can download full sized images from almost any web gallery.
UptimeRobot - Free Website Uptime Monitoring
Vov Picture Downloader - Download pictures from websites.
Pingbreak - Pingbreak is an original and free monitoring service.
Extreme Picture Finder - Extreme Picture Finder is a powerful batch image downloader.