Here is a list of the websites of some friends and collaborators:
Abhinandan
Piotr Achinger
Alexander Bertoloni Meli
Kęstutis Česnavičius
Patrick Daniels
Peter Dillery
Elden Elmanto
Haoyang Guo
David Hansen
Pol van Hoften
Naoki Imai
Hiroki Kato
Wansu Kim
Marcin Lara
Jonathan Leake
Shizhang Li
Masao Oi
Arghya Sadhukhan
Alex Sherman
Koji Shimizu
Alexander Stokes
Finn Wiersig
Bogdan Zavyalov
(Image credit: archives de IHES)