Below is a compilation of some resources for homotopy theory/ algebraic topology, general math, math educators, math undergraduates, and topology conferences. None of this work is mine, I am just compiling amazing works by other people. Any errors in here are entirely mine, please do let me know if you spot any.
Math expositions/notes/resources
Research (Topology)
Resources for homotopy theory and K-theory.
Talbot workshops are excellent way to learn math. They also compile excellent detailed notes which are then made publicly accessible.
Spectra and stable homotopy theory draft (book in progress by Cary Malkiewich).
Non-research (general math)
Quanta magazine math articles, the map of mathematics.
3blue1brown youtube channel.
Math pedagogy resources for educators
MAA teaching and curriculum resources.
Center for innovative teaching and learning at IU - resources.
SIAM resources for educators.
Resources for math undergraduates
SIAM resources for undergraduates.
Josephine Yu's compilation of resources for undergraduates.
Conferences/Seminars/Workshops in topology
Women in topology and women in math research networks.
AIM workshops.
Algtop mailing list: this is an excellent mailing list for topology network notifications.
IU department topology seminar.