Pacific Institute for the Mathematical Sciences (http://www.pims.math.ca/)
This is comprised of several member universities in western Canada (including the U of R) and the University of Washington. It promotes mathematical research, education, training of teachers, and partnerships and collaborations, with a focus on the Pacific rim.
The Fields Institute for Research in Mathematical Sciences (http://www.fields.utoronto.ca/)
This institute, located at the University of Toronto, has as its mission "to enhance mathematical activity in Canada by bringing together mathematicians from Canada and abroad, and by promoting contact and collaboration between professional mathematicians and the increasing number of users of mathematics." Note: This institute does not award the Fields Medal (that is done by the International Mathematical Union), but both the institute and the medal are named after Canadian mathematician John Charles Fields (1863-1932).
Clay Mathematics Institute (http://www.claymath.org/)
This is a private foundation, based in Cambridge, Massachusetts, which promotes mathematical education and research, and the dissemination of mathematical knowledge. It awards the annual Clay Research Award, for breakthroughs in mathematical research. See http://www.claymath.org/research_award/ for a list of award winners.
International Mathematical Union (http://www.mathunion.org/)
This organization promotes international cooperation in mathematics. It awards the prestigious Fields Medal and three other prizes every four years. For a list of Fields Medal winners, see http://www.mathunion.org/general/prizes/fields/prizewinners/.
Canadian Mathematical Society (http://cms.math.ca/)
Provides teaching and professional development resources for Canadian mathematicians.
Statistical Society of Canada (http://www.ssc.ca/)
The main Canadian professional society for statisticians.
American Statistical Association (http://www.amstat.org/)
The main American professional society for statisticians.
American Mathematical Society (http://www.ams.org/)
The main American professional society for mathematicians.
Mathematical Association of America (http://www.maa.org/)
Focuses on undergraduate-level mathematics.
Saskatchewan Mathematics Teachers' Society (http://smts.ca/)
Provides support for mathematics teaching at all levels in Saskatchewan.
Plus Magazine (http://plus.maths.org/content/)
An online open-access magazine that strives to "introduce readers to the beauty and the practical applications of mathematics." (From the web site)
Famous Problems in the History of Mathematics (http://mathforum.org/isaac/mathhist.html)
This is part of the Math Forum @ Drexel University; see below.
This is a brief description of several problems, with the solutions.
The Math Forum @ Drexel University (http://mathforum.org/)
From the home page: "We are teachers, mathematicians, researchers, students, and parents using the power of the Web to learn math and improve math education."
Statisticians in History (http://www.amstat.org/about/statisticiansinhistory/) (from American Statistical Association)
Biographies of important statisticians.
Visual Dictionary of Special Plane Curves (http://xahlee.info/SpecialPlaneCurves_dir/specialPlaneCurves.html)
This is a labour of love of one Xah Lee.