Sanewall is a firewall builder for Linux that uses an elegant language abstracted to just the right level. This makes it powerful and easy to use, audit, and understand. It allows you to create very readable configurations even for complex stateful firewalls. Sanewall can be used for almost any purpose, including control of any number of internal/external/virtual interfaces, control of any combination of routed traffic, setting up DMZ routers and servers, all kinds of NAT, providing strong protection (flooding, spoofing, etc.), transparent caches, source MAC verification, blacklists, and whitelists. Newer versions abstract the differences between IPv4 and IPv6, allowing you to define a common set of rules for both, while permitting specific rules for each as you need. Sanewall is a fork of FireHOL and can make use of existing FireHOL configurations.
Ackr is a very small subset of grep/ack/rak, for lazy developers. grep is a great tool, a very powerful tool, but often too powerful for simple needs. Ackr looks for a search string in all text files and in all subfolders from the working directory, is case insensitive, has no options, doesn't look into hidden folders/files, and displays the search term in a bold font.
objSQL is a PHP-based database access layer for multiple database servers. Primarily designed for small-to-medium projects, it uses an "Object Based" approach for handling general database queries. Built-in support for transactions and prepared statements allow for a common interface to all supported database types. Recordset paging is simplified by incorporating the paging method along with many helper methods for general queries. objSQL is easily extended to create your own unique classes and methods.
Multiple Drop-Down Select Lists Creator is an Ajax script for creating drop-down select lists. Options can be stored in a MySQL database or in a text file on the server. An administration page is provided for composing <option> lists, adding options in <select> lists, modifying options data, deleting lists, and saving and loading lists. Each option can have additional content that is displayed within a separate HTML element.
Adagios is a Web-based Nagios configuration interface built to be simple and intuitive in design, exposing less of the clutter under the hood of Nagios. It has a REST interface for both status and configuration data as well a feature complete status interface that can be used as an alternative to the Nagios Web interface.