Csh Programming Considered Harmful - Tom Christiansen's famous essay on csh's deficiencies - http://www.cs.ruu.nl/wais/html/na-dir/unix-faq/shell/csh-whynot.html
Csh Startup File FAQ - Frequently asked questions about startup files in the C shell. - http://www.sct.gu.edu.au/~anthony/info/shell/csh.startup.faq
Csh One-Liners - C shell command constructs. - http://www.luv.asn.au/overheads/csh-one-liners.html
Introduction to the C Shell - Copy of Bill Joy's original memo. - http://www.softlab.ntua.gr/facilities/documentation/unix/docs/csh.txt
tcsh - Total C shell. FAQ, user manual and links to download binaries. - ftp://ftp.astron.com/pub/tcsh/
CC Shell - C shell with built-in compiler. - http://ccsh.sourceforge.net/