pks-commands.php3 allows your Web server to search and add PGP/GPG keys from the public keys out there. It takes the TCP 11371 port connection and does it all on the web server. It is good in environments where the client machines are unable to get to arbitrary TCP ports (such as behind tightened firewalls).
The Machine Inventory Database (MID) is a Perl-based CGI interface to manage the machines on and off your network, both from the IP assignment perspective and the asset-tracking perspective. On top of acting as a frontend to a handful of MySQL tables, it handles IP assignment and acts as a frontend to the configuration files for BIND, YP, and DHCPD to reduce the chance for typos in the configuration files which tend to bring down service.
Poweradmin is a friendly Web-based DNS administration tool for Bert Hubert's PowerDNS server. The interface has full support for most of the features of PowerDNS including all zone types (master, native, and slave), supermasters for automatic provisioning of slave zones, full support for IPv6, and support for multiple languages.
LAN Management System (LMS) is a set of database-driven applications capable of managing multiple networks of computers and customers. It uses a Web UI and either a multipurpose daemon written in C or a set of Perl scripts that perform scheduled tasks and configure your system services. It was designed to organize small self-financed networks, but is mature enough to suit the needs of medium sized ISPs. Support for multiple databases and languages are included, and a template system allows it to blend in with your existing infrastructure.
scr_ipfm is a PHP script which graphically displays the amount of data downloaded by users in a local network. To do this, it uses logs generated by the ipfm program (available at http://robert.cheramy.net/ipfm/). scr_ipfm features the ability to sort by in-coming data size, out-going data size, total data size, or host. Daily, monthly, annual, and global statistics are gathered.
The Java Application Monitor (JAMon) is a free, simple, high performance, thread safe, Java API that allows developers to easily monitor production applications. JAMon can be used to determine application performance bottlenecks, user/application interactions, and application scalability. JAMon gathers summary statistics such as hits, execution times (total, average, minimum, maximum, standard deviation), and simultaneous application requests. JAMon statistics are displayed in the sortable JAMon report.