Thomas Koeppe, Marianna Khanamiryan, Rui Lima Matos, Scott Hosking, Luke Abraham, Ignacio Pisso.
Fenwick Cooper's littlestick.com - If you want trees...
ECMWF (European Centre for Medium Range Forecasting): Browse for a range of analyses and forecast data produced by ECMWF. Need to apply for downloading permission.
BADC (The British Atmospheric Data Centre): NERC designated data centre for Atmospheric Sciences. Many of the datasets on BADC are publicly available.
HALOE (HaLogen Occultation Experiment): Profiles of the middle atmosphere composition and temperature collected on board the Upper Atmosphere Research Satellite (UARS). Find out more about solar occultation in my glossary.
Trajectory Code: The UGAMP Offline Trajectory Code, written by Dr. John Methven at Reading.
IDL: Coyote's Guide to IDL Programming is full of useful tips and tricks for IDL programming.
NetCDF: A large collection of softwares for manipulating or displaying NetCDF data at Unidata, UCAR.
Gribex: Xconv/Convsh is a really useful little program to convert between various different data formats, in particular, from GRIB to NetCDF.
Emacs! The all important Emacs Manual!
Realclimate.org is a good climate science blog written by climate scientists. Available in several languages.
Meteoblue is a Swiss weather forecast website, with some especially nice weather movies.
Here's an interesting Ozone Textbook.
Typophiles: Here is a nice article by Dario Taraborelli: "The beauty of LATEX". You can find more typography related links on Thomas Koeppe's website.
A very beautiful "g".