I just was reminded of CiviCRM (https://civicrm.org/explore-civicrm) and thought: maybe that could be a useful tool for us to keep track of contacts, supporting members, donations, campaigns and such. Since CiviCRM is primarily used by nonprofits and is Open Source Software, it may be worth a closer look.
@tschoeki / marketing team, @tobias / @gina / Neos foundation, what do you think? Put that on a list?