Mathematical

• arXiv - A preprint archive used by many mathematicians to make their work public before its publication in a peer-reviewed journal.
• mathoverflow - A forum for graduate students and researchers to ask each other questions at a research level.
• The Manifold Atlas - A repository of articles and pages concerning surgery theory and the differential topology of manifolds.
• John Baez's "This week's finds in mathematical physics" - One of the first places I read anything about general relativity was on Baez's webpage and that set me off on my current mathematical career.
• The mathematical genealogy webpage (my genealogy) - Allows you to track your supervisor's supervisor's supervisor's...supervisor.

Academic/education

• Some opinion pieces on teaching mathematics by Vladimir Arnold, and William Thurston.
• Stuart Lee on attitudes towards University funding in the UK.
• Concerned mathematicians vs the state.
• Kirby's commentary on the outrageousness of mathematical journal prices (1997) and the website of the SPARC.
• Ken Robinson on creativity.
• The Faulkes Foundation who funded my PhD and who also fund excellent projects such as the Faulkes Telescope Project, which allows schoolchildren to remotely operate powerful telescopes in Hawaii.

Nonmathematical

• My wife's webpage
• Horror Auribus: my page of readings of short stories by H P Lovecraft, the master of cosmic horror fiction.
• Small Scenes: my blog about fantasy scale models.