These are notes that I either took as a student (instructor is given attribution for these) or notes I have written for my own teaching (no attribution given). All errors can be blamed squarely on me! These notes are for personal use only! If I have put course notes on here from a course I took with you and you'd like them removed, please let me know and I'll take them down.
Abstract Algebra (graduate level): Link
Algebraic number theory (Chris Skinner): Link
Analytic number theory (Kannan Soundararajan): Link
Complex analysis (undergraduate level): Link
Differentiable manifolds (Ravi Shankar): Link
Elliptic Curves (Brian Conrad): Link
L-functions (Kannan Soundararajan): Link
Lie Groups: Link
Introductory Number Theory: Link