Advanced Training in Mathematics Schools,
ICTS upcoming program,
Winter Braids (cnrs.fr) (Applications open generally around September - October)
MathMeetings.net,
AMS Calendar,
All Meetings at BIRS,
ICERM
Geometric group theory
American Institute of Mathematics
MSRI or SLMath
Future activities | CIMPA
Workshops - Sagemath Wiki
Group Theory Impact Factor for various journals,
Unsolved Problems In Group Theory: THE KOUROVKA NOTEBOOK