Systime tells you how much CPU time running a program uses. It is like the classic "time" command, except that "time" only tells the CPU time used by the immediate process, whereas "systime" includes other processes that serve the main process, such as the X server and kernel memory management processes. Systime reports all the CPU time used on the entire system while the subject program was running. It uses Linux's /proc filesystem.
xseg (eXtented SErver Grapher) is a server monitoring tool. It can check whether your server's services are alive. Its output is written to an HTML file. xseg can check the services on both local and remote machines. xseg can also run user-defined shell commands and write the stdout of these commands to an output file. This makes xseg very flexible, since you can write your own shell scripts and xseg will run them and capture their output.
The Eye Of Horus is a monitoring and alerting tool for computers. It's mainly useful for monitoring network services such as HTTP or SMTP servers and the internal status of Unix servers, including load, disk usage, and process counts. It is designed using independent modules with well-defined interfaces, making it easy to customize and extend.
The coronet library implements an epoll and coroutine based library that allows for async operations over certain kinds of files. Any file that supports poll(2) and the O_NONBLOCK fcntl(2) flag can be hosted; this includes like sockets and pipes. The coronet library uses the epoll support available in the 2.6 series of Linux kernels, and the libpcl library for coroutine support.