- Ivan Loseu's seminars. There are notes for almost every talk.
- Notes to Roman Bezrukavnikov's course "Canonical bases and representation categories", by Tina Kanstrup.
- An old page of the Geometric Langlands Seminar at Chicago, with many useful links.
- Dmitry Sustretov's English translation of the Trivium course.
- A pre-packaged GAP3, with Chevie package for computations with Coxeter groups, Hecke algebras, Kazhdan-Lusztig combinatorics, etc.
- SGA 4 1/2 typeset in LaTeX.
- LaTeX symbols lookup.