Review on Cacti by Carlos Phillips

It's great that it can be used both via Web GUI or CLI (command line interface).

Easy setup of various sensors/hosts within your environment with just few clicks in its graphical installer wizard. Great support from cactus team when you run into any issues - they respond super quick! I wish we could export our graphs into some other software like Tableau / Excel which would solve one more issue but then again this might not work if there are no APIs available yet so well worth exploring option. We use cactuas for creating dashboards using all different types of charts such as pie chart etc., also it has been useful while doing load testing sessions by recording loads over time.