Please see http://firehol.org/ for up-to-date releases and information. FireHOL is a stateful iptables packet filtering firewall configurator. It is abstracted, extensible, easy and powerful. It can handle any kind of firewall, but most importantly, it gives you the means to configure it, the same way you think of it.
A wrapper for PHP’s default session handler, using MySQL for storage
...Storing sessions in a database makes them available to all of the servers!
Zebra_Session's code is heavily commented and generates no warnings/errors/notices when PHP's error reporting level is set to E_ALL.
Starting with version 2.0, Zebra_Session implements row locks, ensuring that data is correctly handled in a scenario with multiple concurrent AJAX requests.