General IDL information

comp.lang.idl-pvwave
Usenet group for discussing IDL.
Coyote’s Guide to IDL Programming
There are many articles on common problems in IDL as well as a few advanced ones. The Coyote program library and Mark Hadfield’s Motley Library are available to browse or download.

IDL code libraries

NASA’s IDL Astronomy User’s Library
This is a large library of general and astronomy related routines (including FITS stuff).
Kilvarock
This site has free and for sale IDL programs in special purpose categories: widgets, object graphics, mapping, and some DLMs.
RSI’s User-Contributed Library
This library contains IDL and ENVI routines contributed by the IDL user community and RSI employees.
MG Library
My library contains a collection of routines I’ve found useful. I’ll add to this week by week.
MG Demo Library
Demos as they appear on the website.

Tools for programming in IDL

IDLdoc
Utility to create documentation for IDL code.
IDLWAVE
IDWAVE is made up of IDL editing and shell modes for GNU Emacs and XEmacs. This site hosts the code to download as well as useful help on setup.
GDL
Open source project to make an IDL compiler.

People

Craig Markwardt’s
This contains a variety of IDL routines, most notably some great fitting routines.
Rick Towler
Topics include object graphics, direct input DLM, and using jEdit with IDL.
Robert Barnett
Topics include object graphics, object-oriented programming, and medical imaging.

Scientific visualization/information design

Edward Tufte
Ask E.T. forums have interesting discussions of information design topics.