Karen's Net Monitor perodically tests web servers and email servers of your choice, and attempts to download a specific page. It reports any errors that occur, so you can take corrective action. In addition, it can check for a signature that must be contained in the source code of the page, and alert you if it is not present. The testing interval can be adjusted.

The license of this software is Freeware, you can free download and free use this network monitoring software.