Node.js application which collects system load information at an interval, stores it to MongoDB, and provides REST retrieval endpoints for the ShortView client.
https://github.com/ShortView/ShortViewClient
http://devpost.com/software/shortview
Assuming you're on an ubuntu server:
sudo curl -L https://raw.githubusercontent.com/tsums/ShortViewDaemon/master/install.sh | sh
and you're in business! (we assume no responsibility for this probably destructive script).