NagDroid is a simple frontend for Nagios, which shows a minimalist view of a system's status, formatted for a small screen using regular Android widgets.
It's very basic at the moment, but I'm hoping to improve the layout and design very soon.
The app can be built and installed onto any Android device. There is a server-side python script which reformat's Nagios' status.dat file into XML, which needs to be installed onto the nagios server. This saves a lot of screen scraping effort.
NagDroid is licensed under the GPL version 3.
Available on GitHub at: https://github.com/dantheta/nagdroid