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AlertSite - 30-day Trial; Monitor up to 3 URLs every 10 minutes, with email/pager notification (also can check URLs manually from home page for response time).
Alvias- Checks up to 5 URLs or services every 5 minutes, and alerts are sent to any e-mail device (pager, pda, laptop, etc.).
AtWatch - 14-day trial, checks URL every 2 hours.
WebPerform Web Performance Monitoring - Checks web sites for dowtime/uptime, and full page-loading speeds. Features single page website monitoring with object level detail on page loads, choice of global testing locations, alerting, and reporting statistics.
LinkAlarm - Trial 100 points (pages). Checks every link on up to first 100
pages of website, up to once a day, and emails a report. Has an affiliate program to earn money, or more points for continued service. Additional points only 1 cent each. To conserve points, you can specify particular page(s) or directory(s) to check. Recommended.
PingALink - 1-hour interval monitoring with email alert. 88x30 button required on home page. Also 30-day free trial of their full service option. Recommended.
RedAlert - 30-day trial, checks URLs (http, https; SMTP, POP3, IMAP, telnet, DNS, IRC, gopher, news, finger, or ftp servers; or an unspecified TCP device) every 15 minutes with email/pager notification and optional daily reports. Many advanced options. Recommended.
SiteGadgets - Monitor up to 5 URLs, with email/pager notification when site is down and back up.
WebAssure - 30-day trial, checks 1 URL (http, https, SMTP, news, or ftp) every hour with weekly report and email notification.
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