Easy Hosting Control Panel for Ubuntu is designed for hosting multiple domains on a single machine. It aims to be easy to install and use, simple, and functional. It currently supports Apache, DNS, MySQL, FTP, and email configuration. It mainly uses the apt-get install system, so it can be installed on any Debian-based distribution, including Ubuntu. It features one-click installs, subdomains, password protected domains, email forwarding, domain transfer to another user, multiple templates, server backup and restore, and different menus for the server administrator, reseller, and domain administrator.
The Monkeysphere enables you to use the OpenPGP web of trust to verify ssh connections. SSH key-based authentication is tried-and-true, but it lacks a true public key infrastructure for key certification, revocation, and expiration. Monkeysphere is a framework that uses the OpenPGP web of trust for these PKI functions. It can be used in both directions: for users to get validated host keys, and for hosts to authenticate users.