Clam Shell is a simple shell, designed to be a testbed for user interface ideas. It is a modular shell where the modules can be loaded or unloaded at runtime to expand or contract the functionality of the shell. This lets each user have a set of tools that they like to use, rather than one monolithic shell.
fli4l is a single-floppy Linux-based ISDN/DSL/ethernet-router. It features configuration with some simple ASCII-files, several possible connection-flavors (in/out/callback, and raw IP/PPP), channel bundling (an extra channel can be added through a Windows/Unix-client), configuration of multiple networks, least-cost routing, automatic choice of provider, display/calculation of connection times and costs, and a Windows/Unix client to control dial/hangup, monitor traffic and monitor incoming calls on ISDN (see screenshot).
DIRT is a simple directory stack utility that lets the user use the same directory stack across terminals and sessions. The stack of directories is stored in a file (.dirtpile) in your home directory. All shell sessions access the same file, and thus, all of them use the same stack. DIRT supports jumping to specific entries, push, pop, swap the CWD with the top of the stack, and jump to the top of the stack. A set of CSH shell aliases are also included, and required for proper functioning.
The Tecla library provides programs with interactive command line editing facilities, similar to those of the Unix tcsh shell. It supports recall and editing of previously entered command lines, TAB completion of file names and application specific tokens, and in-line wild-card expansion of filenames. The optionally reentrant modules which perform TAB completion and wild-card expansion are also available separately for general use. The library is smaller, more modular, makes more efficient use of the heap, and has a less restrictive license than GNU readline.
Tcsh is an enhanced but completely compatible version of the Berkeley UNIX C shell. It is a command language interpreter usable both as an interactive login shell and a shell script command processor. It includes a command line editor, programmable word completion, command and file name completion, listing, spelling correction, a history mechanism, job control, and a bunch of small additions to the csh shell itself.