Open Source C# Website Monitoring Tools

Monitors a list of websites to check their status. You can add any url along with a string of text to check for at that url. Minimizes to the task bar and pops up error text when a site fails. Website monitor. Asp.Net Keep Alive.

Waspnest is a website monitoring program that runs as a service under Windows XP. It will send an email notification if a monitored URL is offline. A local SMTP server is not required. It uses sockets to communicate with the target SMTP server.

C#/.NET console Windows app for website content change detection. Sends notifications to email via Mailgun HTTP API. It periodically opens all URLs in the list (in random order) and retrieves content (as text) using the specified selector. If the content changed since the last time, then it sends an email notification with a number of inserted/deleted lines and a DIFF text file. Also, it sends notifications about errors (if repeated more than once in a row) such as when the website is down or the content is not found.