Jesień Linuksowa (Linux Autumn) is a social-scientific meeting for enthusiasts of the Free Software and the GNU/Linux, established by the Polish Linux Users Group (PLUG) management board. They are in a program both official talks, semi-official panel discussions, as well as social meetings and recreation elements. Creating of good conditions to meet the Free Software community, enabling contact, also the skill and ideas-sharing is an aim of the conference. This year the Special Guest of Jesień Linuksowa will be Wietse Venema, known for his software such as the TCP Wrapper and the Postfix mail system.
Official website of meeting: http://www.jesien.org/2011/en/