- Calculator.comDirectory of online calculators
- Dictionary of UnitsFor measurements of all types
- Encyclopedia of Integer SequencesProduced by AT&T Labs
- Math2.orgCollects links to math reference tables
- MathWorldMathematics encyclopedia
- planetmath.orgCollaborative encyclopedia
- Stat TrekTutorials, online calculators, and glossary

- Careers in MathematicsThis guide showcases the broad range of careers that those interested in math can pursue.

- Probability and Statistics (Khan Academy)This website hosts a series of video tutorials dealing with the basics of probability and statistics (both descriptive and inferential).
- Statistics for the Behavioral Sciences (Bauer, NYU)This playlist is a series of introductory statistics course lectures as presented at New York University.
- Introductory StatisticsFree open textbook introducing the concepts of statistics, published through Rice University's OpenStax project.

- American Mathematical Society JournalsCan access abstract and references
- arXivOpen access to e-prints
- Electronic Library of MathematicsFree access to some articles, books, and reports
- Mathematical Sciences Digital LibraryMathematical Association of America
- SIAM Journals Online DatabaseCan search abstracts published by the Society for Industrial and Applied Mathematics