Yorick Unofficial Home:Language for postprocessing or steering large scientific simulation codes, C syntax; introduction, user manual, package documentation, plugin documentation, quick reference, source and binary distribution files, development, FAQ. [Open Source, BSD-like]
Phil Rasch's Yorick page: Useful and important documentation on Yorick and extensions.
Regular Expressions: Yorick Plays a Role: Article at UnixReview.com that discusses some of Yorick's strengths and benefits.
The Yorick Programming Language: An article on Yorick from Linux Gazette
Yorick: Official site. Introduction to the language, user manual, package documentation, quick reference, source and binary distribution files, and FAQ.
Yorick FAQ: Frequently Asked Questions on Yorick and Yorick programming
Yorick Maintenon Branch: Package that provides additional features to Yorick.
YTK: Yorick - Tcl/Tk: Toolkit that adds GUI elements to Yorick.