Tools
CO2 Inventory Sheet
The CO2 inventory sheet helps you to get an overview of your co2 emissions. It helps you to collect the data for servers, clients, transportation and more.
You can use it for free: https://github.com/imix/co2-inventory
currently only available in german.
Zenload
zenload is a command line tool to generate a predicted load on a system.
You can use it for free: https://github.com/imix/zenload