Admin4 is a tool for server maintenance via several plugin modules, running on Windows, Mac OS X, Linux, and many more platforms. Currently, plugins for BIND DNS, LDAP, and PostgreSQL are included. It is designed as a framework, using Python for fast development of plugins and custom modifications. The DNS plugin should be able to query (axfr) any type of server, and performs updates via DDNS, which ensures that it won't interfere with other DDNS clients (DHCP, SAMBA4). For BIND 9.7 and up, statistics are supported as well and used to retrieve the server's zones automatically. The LDAP plugin features browsing and generic editing of all types of LDAP entries with schema support. In addition, high-level editing of objects like users, groups and samba domains is supported. Custom objectClasses and attributes can easily be added. The goal of the plugin was to replace the Windows-only ldapadmin tool with a portable solution.
ExternalSort is a class that can sort large files similar to the Unix sort command. It can read the file to be sorted in small buckets associated with temporary files to not exceed the configured PHP memory limits. The buckets are sorted individually and then merged to produce the final sorted output. The class provides command line interface options so it can be executed as a command from a shell.
Multi-Sandbox Lua Engine (MSLE) is a modified Lua interpreter which supports creation and maintenance of multiple "100% tight" sandboxes from within Lua. "100% tight" means that the amount of memory used by a sandbox (counting both code and data) is strictly limited, a feature Lua did not offer before.
PHP Debug is single API for tracing PHP applications. With a single file of only 200 lines, you can add, with minimal impact, diagnostics to be displayed upon program termination. Each diagnostic contains file, function, and caller function information. You just need to include the debug.php file and add debug() calls throughout your code in the same way as var_dump(). The diagnostic messages are stored and displayed in a list. Diagnostics can be disabled and controlled. It's small and simple yet very versatile.