DF™ Site Monitor - is a system for monitoring web sites. The system allows monitoring the availability of web sites and their content by checking whether the given content exists or does not exist on the site. The system can be used autonomously or as a module for other systems. For acquaintance with system there is demo and trial version of system. System information: • There is a web interface for adjusting the system and watching the monitoring progress and site status. New • Simultaneous scanning of multiple sites. Multithreaded sites check. New • Built-in scheduler enabling the system to work without cron usage. New