The following is a list of useful math tools. The distinction between categories is somewhat arbitrary.

Utilities (General)

1. The Mathematics of Planet Earth (2013)
2. MathWebSearch (Searching Math symbolically on the Web)
3. ChebFun (Numerical computing with functions)
4. Eureqa Formula Discoverer from Cornell Creative Machines Lab
5. The On-Line Encyclopedia of Integer Sequences
6. ISC2.0: The Inverse Symbolic Calculator
7. 3D Function Grapher
8. Julia and Mandelbrot Set Explorer
9. The KnotPlot Site
10. Doron Zeilberger's website
11. The Cinderella Geometry Site
12. The CARMA Douglas-Rachford pages
    1. Simple Douglas-Rachford (in Cinderella)
    2. Composite Douglas-Rachford (in Cinderella)
    3. Multiple Iterates Douglas-Rachford (in Cinderella)
    4. Circle and halfline Douglas-Rachford (in Cinderella)
    5. Matt Tam's summer 2011-12 project: Failure of projection methods without convexity
13. The CARMA Walking on Numbers Project
    1. Jake Fountain's summer 2011-12 project: Visualizing numbers as walks

    Utilities (Special)

14. Auto-simplifying Large Symbolic Expressions (Code)
15. BBP Digit Database
16. Integer Relations Interface: PSLQ and LLL
17. EZ Face: Evaluation of Euler Sums and Multiple Zeta Values
18. Graffiti: Automated and Computer Assisted Conjectures in Graph Theory
19. ProofWeb a system for teaching logic and for using proof assistants through the web
20. Embree-Trefethen-Wright Pseudospectra and Eigenproblems
21. Symbolic and Numeric Convex Analysis Tools
22. MomEnt+ Web Interface

Reference

23. swMATH (an information service for mathematical software)
24. Dynamic Dictionary of Mathematical Functions
25. NIST Digital Library of Mathematical Functions
26. Experimental Mathematics Website
27. Numbers, Constants, and Computation
28. Numbers: the Competition
29. The Prime Pages
30. MathResource Online Dictionary

Content

31. Math in the Media (from the AMS)
32. EMIS-Springer Encyclopedia of Mathematics (wiki with open access)
33. My opinion pieces and blog at Math Drudge
34. Wolfram Mathworld
35. Planet Math
36. Wikipedia: Mathematics
37. Euclid in Java
38. Finch's Mathematical Constants

Math Courses 2014

39. Pure and Applied Experimental Mathematics
    Given over the AMSI Access Grid Network

Math Courses 2011

40. Multi Zeta Values (MZV) Honours Course 2010 (Borwein and Zudilin)
    Given over the AMSI Access Grid Network

Math Courses 2010

41. Experimental Mathematics Honours Course 2010
    Given over the AMSI Access Grid Network

Math Courses 2009

42. Experimental Mathematics Honours Course 2009
43. Mathematics of Inverse Problems

Math Software Course 2008

44. Jon Borwein's M2600 Material

ICCOPT Short Course (August) 2007

45. Jon Borwein's Talks
46. Russell Luke's Talk
47. David Bailey's Talk

MAA Summer Seminar (July) 2007

48. Handout
49. Slides (I), Slides (II), Slides (III),
50. Appendices: Log Concavity, Integer Relations, Strange Functions
51. That's Mathematics! and a 3.14 Minute Movie
52. Ferguson's Art on Display and Article about Ferguson
53. Maple Worksheets: Chapter 1, Chapter 2, Chapter 3, Chapter 5, Chapter 7