osFileManager is a file management script written in PHP. It includes User CP, Admin CP, and many basic file creation/modification tools. File functions include list, open, view, edit, create, upload, rename, and move. User functions include changing one's password and color scheme. Admin functions include adding, editing, and deleting users.
smupcheck, which stands for Smart Update Checker, checks Web sites for updates automatically, even if they don't offer an RSS feed. It is a very basic tool, and does not offer advanced features such as checking password-protected Web sites, highlighting changes, or filtering results.
Drool is a command-line tool that automates the mundane tasks of managing Drupal Web sites on a server and also offers a few more novel features. It can create new sites, install modules and themes directly from drupal.org, and clone one Drupal site to another. It helps you rapidly design themes by automatically skinning images (i.e. chopping and slicing them up for CSS scaling) onto regions of a theme.
PHP Tarbackup is a simple class that allows backing up an entire Web site. It automatically works around timeout limits by splitting the job into multiple requests, allows tarball archive creation and updates, and comes with the Veloce script, which is very useful to automatically unpack tar.gz archives remotely and skip long waiting times due to FTP uploads.
OpenCrypt is a fully automated and self-managing membership and user management system for use on Internet Web sites. It offers support for unlimited membership subscription groups, linked to unlimited secure content areas, and integration with all major e-commerce payment processors. An affiliate system, integrated help-desk, digital file delivery, content management, newsletter and community tools, and in-built shopping cart systems make it an incredible marketing and Web site management tool too. A database integration facility allows you to link registration with any text database or MySQL-based software such as your forum or helpdesk.