Upcoming

Andrew Putman, Andrew Snowden, David Speyer, and I are organizing an AIM workshop on representation stability to take place June 27  July 1, 2016. Details here.
Old notes and seminars
 Seminar on Macdonald polynomials, Spring 2013, Berkeley
 Keg seminar, Fall 2012, Berkeley
 Cluster algebras seminar, Fall 2011, MIT
 Notes for A. Borodin's course "Gibbs measures on branching graphs", Fall 2011, MIT
 Quantum groups seminar, Spring 2011, MIT

Math software
 Macaulay 2  software for commutative algebra and algebraic geometry.
 LiE  software for representations of semisimple Lie algebras
 GAP  software for group theory.
 Stembridge's packages  MAPLE packages for symmetric functions, posets, and Coxeter groups.
 polymake  software for convex polyhedra and related objects
Other links
 Math Overflow  a website for mathematicians to ask and answer questions
 commalg.org  commutative algebra community website
 Ubuntu  The GNU/Linux distribution installed on my computer
 KGS Go Server  play Go online for free
