Sources, documentation and a blog for a port of the original Unix 6th Edition to modern Unix systems, with some backwards compatible enhancements and new utilities.

Open content tutorials and other information on bash, ksh, and zsh.

A high-level examination of the Unix shell.

A command interpreter for the Plan 9 OS. The article contrasts rc with the Bourne shell, the closest Unix equivalent.

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.

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

Ksh and Csh for Win32 environments, as well as a full development environment.

Unix-like command line interface for the Macintosh, modeled on csh.

Jsh advocacy page; hosts documentation, binaries and source for jsh, an OS independent shell with native Java support.

Development page for jsh, an OS independent shell with native Java support. Links to download source and binaries.