I checked Grafana by myself, trying his manual and it's a pretty amazing open source project 100% worth trying.
Behind Grafana is the team of raintank.io, also worth checking out.
If you want to start with a simple test, playing around, there is a demo environment you can use - play.grafana.org
Photo courtesy of Grafana.org
Installation is extremly simple on a ubuntu, redhat or other linux system and you can connect it with a couple of open source databases.
Furthermore you can install it not just on an linux system but also on Windows, MacOS or directly in a docker container.