I work on a product called KanbanFlow (https://kanbanflow...). It's an online Kanban board with support for the Pomodoro technique.
I'm a heavy user of open-source technology, but haven't contributed to that many projects yet.
GOSA is a group for people that wan't to meet and hangout in a creative environment; talking, coding, learning, teaching and inspiring. There are no requirements. Just bring your laptop and get involved to create a creative atmosphere.