uptimerobot

Website monitoring (HTTP HEAD/GET), service monitoring (TCP socket test), e-mail and URL alerts. Open source at https://github.com/TomHetmer/Runtime

Automatically check your website's uptime, performance & quality with Simonbot. Be the first to know if something is going wrong with your website, get results, analyse them and find bottlenecks. …

Webmon is a Realtime Website Monitoring and Escalation Service. Webmon is a website availability monitoring and escalation service that allows you to monitor your online services and get notified upon...

WebSitePulse is a leading provider of advanced, independent and remote monitoring services that enable clients to increase the efficiency of their mission-critical e-business operations, and to reduce their...

Monitorius is simple uptime monitoring service for all your needs - website monitoring, server monitoring, ping monitoring made really easy.

Monitor Scout is a leading website and server monitoring company, with a wide selection of flexible, high quality services. The reliable web-based system monitors your websites and server 24/7 and …

1 minute availability monitoring service for only $4.92/month. Monitoring stations on 4 continents, email, SMS and RSS alerts.

StatusCake enables the visitor to track unlimited websites for free and get alerts when the site is down or having trouble. StatusCake also tracks performance over time so a webmaster …

Affordable Web site monitoring and testing for individual sites, applications, and networks. We offer load testing, network monitoring and free website monitoring trials.Dotcom-Monitor® is an advanced...

Founded in February 2002, WatchMouse is a global industry leader in self-service website and application performance monitoring. WatchMouse product tests the behaviour and availability of websites, services...

Your website early warning system. Get notifications if your website goes offline, starts running slowly or reports errors. Erlywarn is an monitoring service with a wide range of notification options....

Monitor your website from worldwide locations 24x7 and be the first to know when your website is down. Receive instant alerts via SMS, email & twitter. Detailed uptime, performance & …

Simple website monitoring with a pay-as-you-go pricing model. Will monitor sites between 1 minute and 1 hour. Monitors http, https and ping.

NotiPage is a free webpages monitoring software. Once you've configured a monitoring alert related to a specific webpage, NotiPage will automatically check this webpage on a periodic basis until all …

Monitor 2 websites with 15 min interval for FREE! Checks your website every 15 minutes. Get trouble alerts by email or sms. Instant alert through SMS, email notifications, tweet, feeds …

An easy and online tool that does website monitoring and server monitoring for you 24/7. Record uptime, response times (performance) and downtime causes. Generate your own custom reports. Using Port …

Page2RSS is a service that helps you monitor web sites that do not publish feeds. It will check any web page for updates and deliver them to your favorite RSS …

Update Scanner is a Firefox extension to monitor web pages for updates. Useful for websites that dont provide Atom or RSS feeds. Features: * Select how often each site will …

ChangeDetection.com provides page change monitoring and notification services to internet users worldwide. Anyone can use our service to monitor any website page for changes. It is possible to enter some...

Track web page changes in any web page daily for free users, every 30 mins for paid users - no RSS or Atom required. Receive notifications via Email, Notifo, Instant …

Follow That Page sends you an email when your favorite web pages have changed.

TrackEngine allows users to monitor any websites and to be alerted of new content on any devices.

Versionista was designed for the rough-and-tumble world of today's Web, where subtle edits can offer actionable tactical advantage. * Monitor entire Web sites and receive e-mail alerts when changes...

Monitor and keep track of webpages using your Firefox browser. Keep track of changes in text or image. Use yhis to keep track of websites that dob't offer a feed! …

Free simplest server monitoring. 10 minutes checks interval. Up to 10 services per account for free. Multiple contacts. Availability history. Public status page. Uptime statistics.