Get the latest stable release 4.0.0.FD85, containing YouTube for Education and Google Apps for Business enforcements and better HTTP(S) request filtering, released on January 20th, 2015.
Next version of Web Safety supports experimental deployment on Microsoft Windows and selective/automatic HTTPS filtering for specific policies and web site categories.
Current version of Diladele Web Safety supports FreeBSD and pfSense. Default Squid proxy package that comes with this OS does not include ICAP module so you would need to install Squid from ports.
Diladele Web Safety for Squid Proxy supports native installation on most well-known Linux distributions, including RedHat, CentOS, Fedora, Debian and Ubuntu.