The Jermiah Horrocks Institute website.

NASA Astrophysical data system.

Astro ph on arXiv.

The RAMSES patch based AMR simulation code.

MPgrafic large scale cosmological initial condition generator for simulations.

MUSIC large and zoom initial condition generator for simulations.

TIPSY N-Body simulation viewing software.

GIZMO Multimethod simulation code.

Fortran 77 tutorial.

Linux tutorial for beginners.

Shell script tutorial.

VIM Adventures - an interactive game to learn the basics of VIM.

Python tutorial.

Dive into Python.

F2PY - a nice way to cross compile fortran modules to be read in by python scripts.

bento tutorial on everything you need to know about web development.

Regex golf