PHP System Information (pseudo class) is a collection of functions that return server system information through command line and /proc data gathering. Examples of such data include number of currently logged-in users, traffic information (bytes/packets) on network interfaces, system memory details, system uptime, and login statistics.
IMP is a set of PHP scripts that implement an IMAP based webmail system. Assuming you have an account on a server that supports IMAP, you can theoretically use an installation of IMP to check your mail from anywhere that you have web access.
A wiki application specifically for documentation building. Uses Text_Wiki so it can convert from wiki to any other format (XHTML for now; RTF, DocBook, and others are planned). Multiple sub-wikis (areas), access control list, anonymous and authenticated users, hierarchical mapping, built-in comment system, and more.
Most computers have a variety of log files being written to. Log File Status lets you monitor them from your web server. Basically, it reads the tail 10 lines from the log file, highlights them, and displays them. Handy for distributed.net log files or web server error logs.