There are 2 repositories under change-alert topic.
The best and simplest free open source web page change detection, website watcher, restock monitor and notification service. Restock Monitor, change detection. Designed for simplicity - Simply monitor which websites had a text change for free. Free Open source web page change detection, Website defacement monitoring, Price change notification
Web Site Page Changes Monitor. 网站网页页面更新变更监控提醒。
Track changes on websites via git
Minimal Webpage Monitor for Academics
Solr Index Change Alert is a WebSocket application developed using Spring Boot, that is used to monitor Apache Solr Index files for any type of alterations/changes and the creation and deletion of index files in real time.