• LWP::UserAgent::WithCache (Authen-Captcha)

Установка FreeBSD.

 # cd /usr/ports/security/p5-Authen-Captcha/ && make  && make install

Установка Ubuntu, Debian

# apt-get install  libauthen-captcha-perl

Установка с CPAN

# perl -MCPAN -e shell 
install Authen::Captcha