Oracle Toolbox is a collection of PHP scripts that permit you to administer an Oracle database via your Web browser in a single interface. You can find out more about it and get it here: http://www.oracletoolbox.org/
Oracle Toolbox gives you a wealth of information on processes, uptime, stats, and other metrics. It also lets you do nearly anything you might to do from a remote environment. This would be a very handy addition to any DBA's toolset.