Maegios is a project mainly written in Python, it's free.
Nagios client for Maemo
Receive Nagios alerts on your Maemo device. Monitor status of hosts and services in your Nagios instance. Desktop widget and vibration, sound, light, text alerts are included.
Maegios can be installed from extras-devel repository: http://repository.maemo.org/extras-devel.
run-standalone.sh python2.5 build_maegios.py
cd .py2deb_buildfolder/maegios
dpkg-buildpackage -rfakeroot
mkdir -p ~/releases/maegios/
cp ../maegios