Real time monitoring : RPi-Monitor always keep an eye on your computer
RPi-Monitor is a monitoring tool which keep an eye on your computer and can give you the current status and the history of resources usages in a nice looking and interactive web interface.
RPi-Monitor is design to be light and powerful and doesn't relies on other software to run. It has been deigned to run on embedded device and consume very few system resources.
Freyr is a resource monitor/dynamic DNS updater that allows dynamically change DNS records for different services depending on their state. So you'll be able to keep only active IP addresses in your DNS database.
WebCheck is a simple device (computer, router, firewall) health status checking or monitoring over HTTP protocol. Very useful to keep track the status of of a multiple servers or workstation from remote location.