State of Krakow Communities I'm involved with @ 2016. For a Google organised Kraków Communities Dinner.

1. Konrad `ktoso` Malawski
founded: GDGKraków, Lambda Lounge Kraków, Kraków Scala
leading: SCKRK, PolishJUG, GeeCON, GeeCON 4 Kids
day job: jvm performance and distributed systems – Akka @ Lightbend

2. Kraków Communities a few years ago

3. Kraków Communities recently

4. PolishJUG / GeeCON:
Adrian Nowak, Andrzej Grzesik, Marcin Gadamer,
Jakub Dżon, Tomasz Borek
SCKRK:
Adam Pohorecki, Marcin Kostrzewa, Łukasz Dubiel, Łukasz Jachym
Lambda Lounge:
Adam Szlachta, Tomasz Borek; Michał Herda (kraklisp) (!)
Kraków Scala:
Rafał Pokrywka, Krzysztof Romanowski, Michał Pociecha
GDG:
Lidia & Mateusz Herych, Konrad Dzwinel, Michał Bryś, dos ;-)
Credit where it’s due (+ anyone I forgot to add)

5. GDGKraków
GTUG :-)
Kicked off as GTUG, later renamed.
Spawned Frontend / Go / Business spin-offs.
Founded: ~2011
Members: 1200+
Actively looking for fresh blood if you’d like to help out!
Past meetups: 60+ and a few conferences
http://gdgkrakow.pl

6. Meetings around Scala and distributed systems.
Increasingly popular and in high demand recently :-)
Founded: Feb 2013
Members: 520
Past meetups: 49
Upcoming meetup: 20th Jun
http://krakowscala.pl

7. Polish Java User Group
http://java.pl & http://meetup.java.pl
Founded by Adrian Nowak and Radek Holewa,
back when when Java was new :-)
First Java conference, by Adrian, in 2001
by inviting Bruce Eckel (Thinking in Java)
Members: 1500+
Past meetups: hard to count, 100+
Still very active.

8. Lambda Lounge Kraków
http://lambdakrk.pl
All functional programming debates that
didn’t have other groups at that time.
Founded: Feb 2013
Members: 520
Past meetups: 49
Upcoming meetup – kind of @ 10 Jun – KrakLisp

9. http://geecon.org
Founded because there wasn’t any proper
“international” JVM-related conference in eastern europe.
GeeCON made it happen.
Also expanded to: Czech Republic, Poznan, Tricity
Founded: 2009 (7 years of geecon!)
Attendees on each event: 1200+
Main event – each May in Kraków
Let’s move the Java world!

10. http://sckrk.com
http://kto.so/2016/05/16/sckrk-the-ultimate-100-meetings-96-whitepapers-5-years-and-more
Founded by Adam Pohorecki, 5+ years ago.
Regular 2-weekly ever since.
Computer Science Whitepaper Reading Club
Very unique group, requires actuall effort to participate properly.

11. Computer Science Whitepaper Reading Club
105+ meetings 96+ whitepapers
1000+ people 5+ years