Dejal Systems has announced Simon 3.6, an update of the server monitoring tool for Mac OS X 10.6 or higher.

Simon checks web pages, FTP and DNS servers, local or remote ports or volumes, and many other kinds of services for changes or failures, with lots of notification and reporting options. Version 3.6 includes new Notification Center and History plug-ins, a rewritten Twitter plug-in, several report enhancements, and other improvements.

Dejal Simon costs US$49. Version 3.6 is a free update for licensed Simon 3 users, with upgrades from version 2 starting at $19. Go to for more info.