Montastic is a quick to setup and completely free website uptime checker and monitoring tool. Track up-to 100 different websites simultaneously.

Feature Overview
- Track your website 24/7. Note: Provides rather low ping frequency (At most once in 10 minutes).
- Websites checked from at least 2 different locations.
- Get an alert email when your site goes down and when it’s up.
- Monitors uptime status via RSS feeds.
- Track up to 100 websites simultaneously.
- Yahoo Widget: Track Uptime status right from your desktop.
Check out Montastic @ www.montastic.com