You can take a look at some of the tools I use
Apache - Web server including all modules. Postfix - Email server that can do magic. SpamAssassin - The email spam buster. Amavis - Email Virus scanner. Kaspersky - Virus checker. MailMan - The GNU mailing list manager. FreeVSD - Virtual servers. ezPublish - Content management system. Cpanel - Control Panel. H-Sphere - Control Panel. Webmin - Control Panel. Ensim - Control Panel. Plesk - Control Panel. Squirrelmail - WebMail for nuts. MySQL PHP Cyrus ProFTPD Bind Qmail Sendmail MRTG IPtables CheckPoint's FW-1 All linux software and tools that come with any nstallation.