Yup, Docker. It's An open platform for distributed applications.
Should I attend?
If you're developer, sysadmin, DevOPS, technical leader than yes, you should attend.
Why? Because Linux Containers change the IT infrastructures and the way we create and deliver services.
When and where?
All event details, place, agenda, registration etc are on the meetup webpage: http://www.meetup.com/Docker-Krakow-Poland/events/219831894/