32bit Service Monitor   
http://www.electrasoft.com

Monitors Internet Services and alerts the user with a variety of methods if down. Always know whether or not your web site or other network services are up or down with 32bit Service Monitor. 32bit Service Monitor will check your site or other services as often as you have it configured to. If one of your services stops responding, you will be notified in the ways you have configured and the down time will be logged. If you pay a firm to host your site or service, you should be able to get at least a partial refund from your site hosting company if any serious down time occurs. Save money with 32bit Service Monitor! If one of your Internet Services goes down, you will be alerted by any or all of these many alarms. Select Alerts include: [Error Sound], [Plays your choice of WAV files (once or repeatedly)], [Show Alert Message box], [Send Email at Beginning of Alert], [Send Email at Ending of Alert], [Page you, Phone you], [Execute a Program]. You can use the 32bit Service Monitor [Execute Program] option to fix the problem in many cases. If your site or service does go down and then come back up without you knowing about it, 32bit Service Monitor will send you emails documenting the events date and time from down to up again.

First Alert Service Monitor   
http://www.electrasoft.com

Monitors Internet Services and alerts the user with a variety of methods if down. Always know whether or not your web site or other network services are up or down with First Alert Service Monitor.First Alert Service Monitor will check your site or other services as often as you have it configured to. If one of your services stops responding, you will be notified in the ways you have configured and the down time will be logged. If you pay a firm to host your site or service, you should be able to get at least a partial refund from your site hosting company if any serious down time occurs. Save money with First Alert Service Monitor! If one of your Internet Services goes down, you will be alerted by any or all of these many alarms. Select Alerts include: [Error Sound], [Plays your choice of WAV files (once or repeatedly)], [Show Alert Message box], [Send Email at Beginning of Alert], [Send Email at Ending of Alert], [Page you, Phone you], [Execute a Program]. You can use the First Alert Service Monitor [Execute Program] option to fix the problem in many cases. If your site or service does go down and then come back up without you knowing about it, First Alert Service Monitor will send you emails documenting the events date and time from down to up again.

ServiceQuery   
http://www.infinites.com

Service Query fills the need with a fast multi-threaded application to search your Windows network for services. Can be filtered to show on those running, stopped or by name. Change Service passwords and usernames across entire domains. Run scripts against selected services to stop a service, copy files, and restart it again. Run reports and save them to CSV file for later use.

ServersCheck STANDARD Edition   
http://www.serverscheck.com

ServersCheck Standard Edition is a tool for monitoring, reporting and alerting on network and systems availability. The standard version can be used for free with up to 5 devices, which is adequate for personal use. It can monitor any TCP Port (HTTP, HTTPS, FTP, NNTP, POP3, SMTP, VNC, DNS, etc.), check Oracle, MySQL, ODBC databases, trap SNMP values (disk space, free memory, CPU usage,...), verify content served from a web server and check NT services, NT or Linux Processes availability. In addition, it also can monitor environmental devices like temperature, humidity, flooding. ServersCheck runs as a local service and is administrated through a browser interface by connecting to the built-in web server. Additional features include graph output for long-term statistics tracking. Alerting can be done through email, SMS, MSN or network message

ORF Enterprise Edition   
http://www.vamsoft.com

ORF Enterprise Edition is an enterprise-level anti-spam solution that helps you to block spam before it reaches your network. It wedges into the SMTP conversations and monitors all incoming SMTP traffic. For the most effective filtering, ORF uses a combination of anti-spam technologies, such as DNSBL's, SURBL's or Greylisting to identify and blacklist unsolicitied emails. Custom tests are provided in addition to the above, e.g. regular expression-supported keyword filtering, attachment filtering or Active Directory-based recipient validation. Using the self-learning Automatic Sender Whitelist of ORF, you can eliminate false positives effectively. You can also create your own IP address, sender and recipient email address lists. While the whitelists can be used to exclude hosts, senders or local mailboxes from filtering, the same type of blacklists help you to reject messages from specific hosts or IP ranges, senders (domains) or local mailboxes. ORF can be used with Windows 2000/2003 built-in IIS SMTP Service and Microsoft Exchange 2000/2003 Servers (which use this service for SMTP communication). ORF was designed with high-performance and robustness in mind, it performs well even under heavy usage. It is being used in networks with a daily average of 2-3 millions incoming email without any performance problems.