Free software has much to offer non-profit organizations (NGOs). If you are reading this, you are probably a member or participant of an NGO, and I hope I can show you why free software and open standards are important for your organisation. Or maybe you are a free software supporter who’d like to see a change in a social organisation near you. In any case, I will try to give you a few arguments in favour of free software, along with some practical information on how to successfully face a migration process from proprietary software.