My favourite MSE answer.
A drawing of the Hopf Fibration by Lun-Yi Tsai that reminds me of Dr. Seuss.
Typed solutions to exercises for Math 427 (Algebraic Topology) Exercises are often not up to date and Pdf viewing may not work properly on mobile.
A problem set I made for UBC math circle UBC Math Circle is an Undergrad run outreach program which has guest lectures and problem sets for interested highschool students.
An article I'm particularly fond of.
I will try to include some more stuff here some day.