Horatio Content Protector
Horatio is a set of Perl scripts, HTML pages, JavaScript, and .htaccess files that work hard to allow only legitimate visitors to access your valuable content. Contains all the old tricks, and one or two new ones. Repels 99% of known Internet pests. Has interesting 'fun' and bonus features for the intelligent webmaster. Features: Stops bots, site rippers, leech programs, password hurlers, hot-linkers, cloaks HTML code, disables copy and print. Parts of it can be used independently from the rest of the package. Requires Apache Web server, Perl 5 and Server Side Includes.