SGQI is a print quota system for CUPS. It features per-printer user and group quotas, automated popup messages to users, and a Web application that lets users access print quota usage reports with a complete job history. Users, groups, printers, and quotas are all administered through the Web.
KLone is a fully-featured, multi-platform framework which allows dynamic Web pages to be written in C/C++ (with the usual <% /* code */ %> style). The pages can then be embedded (in compressed and/or encrypted form) into a single executable that also contains KLone's high-performance HTTP/S server. Given its nature, it can be linked natively to any C/C++ library (database, XML, graphics, etc.), without an intermediate layer, and it is especially suited for low-resource (embedded) systems.
Ops Control Panel is a frontend for MRTG. Unlike many other frontends, it does not have any requirements beyond those of MRTG, although it can support PHP-enabled Web servers instead of just running as a Perl CGI script. It provides overviews of MRTG-based monitoring pages in a variety of formats.
phpBBHC (PHP Big Brother Hosts Configurator) is a collection of PHP scripts and one C program to give a Web-based interface for adding, deleting, and modifying hosts which are monitored by Big Brother. Although Big Brother has since been replaced by Hobbit, phpBBHC can still configure Hobbit thanks to the backwards compatibility of Hobbit.
Sysmon is a tool to monitor the state of one or more computers. It’s based on a daemon and a PHP script. The first has to be runned in all boxes you need to check, and the second calls the daemon and prints the state into a nice Web frontend. The sysmond functions can be easily expanded by writing modules.