Here are some links which I find useful.
Institut für Mathematik, HU-Berlin
Pure Mathematics UWaterloo
Fields Institute
Simons Center for Geometry and Physics
Spiro Karigiannis
Thomas Walpuski
arXiv:Differential Geometry
arXiv:Symplectic Geometry
Mathscinet
Thematic Program in Geometric Analysis - Fields
Institute
Simons Collaboration on Special Holonomy in Geometry, Analysis,
and Physics