Here are the study groups I've found on the forum which appear to be active (I'll add more to the list as they're announced):
- Basque Group 2017
Czech or Slovak Group
Celtic Team - Study Group
DELE Spanish group
East Asian Team - 2017
English Study Group
Esperanto Study Group
Finnisch mit extra Mühe - a group learning project
French C1 Group
French Group 2016 - 2017 Les Voyageurs
German group
Italian study group
Polish group
Russian Study Group
Sign Languages Study Group
Spanish Group
Team Middle East
Team Nordic [study and support group]
Team Tea and Scones (English as a Second Language)
Good luck to everyone in their studies, and let's help each other achieve our goals together in 2017 and beyond!