Open Source Day is an international conference gathering fans of open solutions from Central and Eastern Europe. Mission of the event is to introduce open source solutions to Polish public and business institutions and popularize it as a secure, efficient, cost saving alternative to proprietary software.[1] The conference has taken place in Warsaw since its beginning in 2007. Participants are mainly managers, developers, technical officers of public, banking, and insurance industries.
The conference has become a platform for exchanging experience, contacts and use cases of open source solutions in fields of: virtualization, cloud computing, database, big data, Information security.