Launched in December, 2005, Aotol is a web page change detect robot which is developed by Australian software development company AOTOL PTY LTD. Today, Aotol has severed users for years.
Aotol provides you:
Monitor submitted page
Check the page updates in real-time
Alert the changes in real-time
Highlight the changes
Keep the change history
Filter the changes you are not interested in, and a lot more features.