arXiv
MathSciNet
Math Genealogy Project
American Mathematical Society (AMS)
Mathematical Association of America (MAA)
Association for Women in Mathematics (AWM)
TeXstudio
Overleaf
AMS TeX resources
A 30-page guide to LaTeX2e
A LaTeX Wikibook
The LaTeX Cheetsheet by Winston Chang
tikz-cd editor
Mathematica
MATLAB
Purdue math department
People
Course pages
Course descriptions
Seminars
Undergraduate research
Brightspace
Gradescope
Pearson MyLabMath
BoilerLink
Student services
CAPS
Wikipedia
xkcd
PHD comics
WFMT
Postcrossing
LeetCode
Paper-sorting instructions