IPHPLog (IP PHP Log) is a simple software written in PHP, JS and SQL that runs over a MySQL database manager system . IPHPLog can log the information of your visitors and organize that on a data base with GeoIP.
ISPMan is a system to design massive ISPs using LDAP as the backend.
ISPMan provides a web front end and a command line interface to create virtual domains and manages users, dns information, email infos and httpd setup data for these vhosts.