Commandline Culture Shock

Advocate essay and guide for new shell users.
http://www.dsj.net/linux/commandline.html

pdksh

Public domain Korn shell. Manuals and links to download it.
http://www.cs.mun.ca/~michael/pdksh/

Korn Shell Home

Korn shell resources and documentation with multiple versions available for download.
http://www.kornshell.com/

Shell Overview

A high-level examination of the Unix shell.
http://www.mcsr.olemiss.edu/unixhelp/shell/index.html

comp.unix.shell FAQ

Plain-text FAQ with newsgroup links.
http://www.faqs.org/faqs/unix-faq/shell/intro/

HTML Shell

A platform for embedding Unix shell commands and complete shell scripts into a webpage.
http://www.nmmm.nu/linux/sh/htsh.htm

Jsh Development Home

Development page for jsh, an OS independent shell with native Java support. Links to download source and binaries.
http://sourceforge.net/projects/jsh/

Softpanorama Open Source University

Open content tutotials and other information on bash, ksh, and zsh.
http://www.softpanorama.org/Scripting/shells.shtml

Rc, the Plan 9 Shell

A command interpreter for the Plan 9 OS. The article contrasts rc with the Bourne shell, the closest Unix equivalent.
http://plan9.bell-labs.com/magic/man2html/1/rc

RC Shell

Unix port of the Plan-9 OS rc shell.
http://www.star.le.ac.uk/~tjg/rc/

VCL Man Page

Manual page for VCL, a VMS shell emulator for Unix.
http://hepwww.ph.man.ac.uk/people/jbanks/vcl.html

Shell Configuration Files

Example startup files for bash, csh, ksh, sh and zsh.
http://www.dotfiles.com/index.php3?cat_id=6

Open DCL Lite

Unix/GNU-Linux DCL emulator.
http://www.accelr8.com/dcll.html

VCL

Boston Business Computing's VCL page.
http://www.bosbc.com/vcl.htm

AE Shell

A standards-compliant Bourne Shell clone for Unix. Site includes source, binaries and documentation.
http://www.cse.unsw.edu.au/~neilb/oss/ae/

Psh Development Home

Development page for psh, a native perl shell for Windows 95/98/2000 and POSIX operating systems. Documentation and mailing list archives available online, with source and binaries available for download.
http://sourceforge.net/projects/psh/

Dotfile Generator

Program to automatically build configuration files for BASH and C shells.
http://www.blackie.dk/dotfile/

Last File Manager

A Midnight Commander clone written by a hobbyist in Python. [Open Source, GPL]
http://www.terra.es/personal7/inigoserna/lfm/

scsh

A broad-spectrum systems-programming environment for Unix-like operating systems. Based on R5RS Scheme.
http://www.scsh.net/

MUD-Shell

Shell written to operate like a text adventure game or MUD. Open source implementation in Perl.
http://www.xirium.com/tech/mud-shell/

New Adventure Shell

Script written in ksh/bash/zsh which causes the user's shell to act like a text adventure game.
http://nadvsh.sourceforge.net/

Wapsh Home Page

A shell allowing logins to a Unix system from a WAP enabled cellular phone.
http://www.exolution.de/geschaeft/produkte/wapsh.en.htm

JSH Resources

Jsh advocacy page; hosts documentation, binaries and source for jsh, an OS independent shell with native Java support.
http://gerard.collin3.free.fr/

VXDCL

A Unix port of the OpenVMS DCL interactive shell and command language.
http://www.sector7.com/OPENVMS%20MIGRATION/VX%20Tools/vxdcl.htm

Cygwin

Windows ports of many of the popular GNU software tools, including the BASH and tcsh shells.
http://www.cygwin.com/

GNV

A Unix environment for the VMS operating system, including a port of the bash shell.
http://gnv.sourceforge.net/

Hamilton C shell Product Overview

Hamilton C shell recreates the original UNIX C shell and utilities completely from scratch on Windows NT, Windows 95 and OS/2, adding numerous enhancements.
http://www.hamiltonlabs.com/cshell.htm

MacShell

Unix-like command line interface for the Macintosh, modeled on csh.
http://www.cs.washington.edu/homes/fred/macshell.html

MKS Toolkit

Ksh and Csh for Win32 environments, as well as a full development environment.
http://www.mkssoftware.com/products/tk/ds_tkdev.asp

Win32 ZSH

Z Shell ported to Windows 95/98/NT.
ftp://ftp.blarg.net/users/amol/zsh/