Fritz!WRT is a set of patches to make the OpenWRT trunk run on AVMs Fritz!Box. Much progress has been made in recent OpenWRT revisions in the AR7 port, but it's still not running on the Fritz!Box. The patches also have the potential to make the T-Com SpeedPort run, because its hardware is very similar to that of the Fritz!Box. There are patches for the bootloader, LED support, and watchdog support, as well as KGDB support.
mod_top is a production monitoring tool for LAMP applications with user interfaces modeled after the popular Unix top. It plans to support PHP, Perl, Ruby, Python, mySQL, PostgreSQL, and Apache 1 and 2 on Linux. It can help you locate bottlenecks in applications, troubleshoot high memory consumption, understand CPU utilization under load, diagnose causes of slowness or heavy resource utilization, or discover database dependencies.
net-status-monitor is a simple console script to test whether Internet connectivity is working. If it is, the script tells you the external IP address (in case your dynamic DNS provider is down). If not, it tries to find the point where the connectivity fails. The output is quite simple, so you can put it on your grandmother's PC. "Just tell me what the read line says" should give you enough information.
check_aaccli is a plugin for Nagios which checks the hardware health of Adaptec SCSI RAID controllers. To accomplish this, you must have installed the aaccli binary (from the aacapps package). The plugin checks the error log of single disks (with S.M.A.R.T.) and the health of mirror containers.
pwatch is a set of tools for analyzing what a process is doing. Only the "io" command is currently implemented. It presents I/O activity in a nice ncurses screen and allows you to sort by the read/write speed or the number of bytes read/written since the start of the program. It was written to easily detect which program is eating a lot of I/O bandwidth.