This CGI program can trap malicious robots that spider your website. The program works by blocking access from the bot's ip address. It can also provide an unlimited number of false e-mail addresses to muck up databases of email harvesting bots.
Memephage is an automated web log (blog). It passively gathers and summarizes links from various places. Currently: IRC, social MUDs, e-mail, and web browsers. Uses the POE multitasking and networking framework for Perl.