If i need to pack (e.g. with PAR) perl code to run it on a PC where perl is not installed I often use SQLite instead of MySql because this database consists only of a flat file, and the interface mechanism consists of perl modules (e.g. DBI and DBD::SQLite) which can be packed easily. So I don't need to tell people on how to install MySql

As a webserver, an interesting alternative to HTTP::Daemon is POE (see the POE-Cookbook -> Web)