GNU Serveez is a server framework providing the routines necessary to easily implement IP-based servers in your application. It demonstrates aspects of network programming in a portable manner, making it convenient for both simplifying the process of adding a server to your application or for learning about how network services work. Several example servers are provided already, such as an HTTP server and an IRC server.

Linenoise is a minimal, zero-config, readline replacement. Its features include:

1. Single and multi line editing mode with the usual key bindings

2. History handling

3. Completion

4. Hints (suggestions at the right of the prompt as you type)

5. A subset of VT100 escapes, ANSI.SYS compatible

S is a new shell that aims to be extremely simple. It does not implement the POSIX shell standard.

There are no globs or "splatting" where a variable $FOO turns into multiple command line arguments. One token stays one token forever. This is a "no surprises" straightforward approach.

There are no redirection operators > in the shell language, they are added as extra programs. > is just another unix command, < is essentially cat(1). A andglob program is also provided along with s.

loksh is a Linux port of OpenBSD's ksh. It is a small, interactive POSIX shell targeted at resource-constrained systems.

Tcsh is an enhanced, but completely compatible version of the Berkeley UNIX C shell (csh). 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, spelling correction, a history mechanism, job control and a C-like syntax.

Scsh is a Unix shell embedded in Scheme. Scsh has two main components: a process notation for running programs and setting up pipelines and redirections, and a complete syscall library for low-level access to the operating system.

Oils is a programming language with automatic translation for Bash. It includes OSH, a Unix/POSIX shell that runs unmodified Bash scripts and YSH is a legacy-free shell, with structured data for Python and JavaScript users who avoid shell.

Oksh is a portable OpenBSD ksh. Not an official OpenBSD project. Unlike other ports of OpenBSD ksh, this port is entirely self-contained and aims to be maximally portable across operating systems and C compilers.

Xonsh is a Python-ish, BASHwards-looking shell language and command prompt. The language is a superset of Python 3.4+ with additional shell primitives that you are used to from Bash and IPython. It works on all major systems including Linux, Mac OSX, and Windows. Xonsh is meant for the daily use of experts and novices alike.

This is a reimplementation by Byron Rakitzis of the Plan 9 shell. It has a small feature set similar to a traditional Bourne shell.

Es is an extensible shell. The language was derived from the Plan 9 shell, rc, and was influenced by functional programming languages, such as Scheme, and the Tcl embeddable programming language. This implementation is derived from Byron Rakitzis's public domain implementation of rc, and was written by Paul Haahr and Byron Rakitzis.

fish-foreign-env wraps bash script execution in a way that environment variables that are exported or modified get imported back into fish.

The Z shell (zsh) is a Unix shell that can be used as an interactive login shell and as a powerful command interpreter for shell scripting. Zsh can be thought of as an extended Bourne shell with a large number of improvements, including some features of bash, ksh, and tcsh.

mksh is an actively developed free implementation of the Korn Shell programming language and a successor to the Public Domain Korn Shell (pdksh).

Fish (friendly interactive shell) is a shell focused on interactive use, discoverability, and friendliness. Fish has very user-friendly and powerful tab-completion, including descriptions of every completion, completion of strings with wildcards, and many completions for specific commands. It also has extensive and discoverable help. A special help command gives access to all the fish documentation in your web browser. Other features include smart terminal handling based on terminfo, an easy to search history, and syntax highlighting.

Oils is a programming language with automatic translation for Bash. It includes OSH, a Unix/POSIX shell that runs unmodified Bash scripts and YSH is a legacy-free shell, with structured data for Python and JavaScript users who avoid shell.

Gash is a POSIX-compatible shell written in Guile Scheme. It provides both the shell interface, as well as a Guile library for parsing shell scripts. Gash is designed to bootstrap Bash as part of the Guix bootstrap process.

Gash-Utils provides Scheme implementations of many common POSIX utilities (there are about 40 of them, ranging in complexity from false to awk). The utilities are designed to be capable of bootstrapping their standard GNU counterparts. Underpinning these utilities are many Scheme interfaces for manipulating files and text.

GNU Rush is a restricted user shell, for systems on which users are to be provided with only limited functionality or resources. Administrators set user rights via a configuration file which can be used to limit, for example, the commands that can be executed, CPU time, or virtual memory usage.

Dash is a POSIX-compliant /bin/sh implementation that aims to be as small as possible, often without sacrificing speed. It is faster than the GNU Bourne-Again Shell (bash) at most scripted tasks. Dash is a direct descendant of NetBSD's Almquist Shell (ash).

This package provides syntax highlighting for Zsh. It enables highlighting of commands whilst they are typed at a Zsh prompt into an interactive terminal. This helps in reviewing commands before running them, particularly in catching syntax errors.

This is a clean-room implementation of the Fish shell's history search feature, where you can type in any part of any command from history and then press chosen keys, such as the UP and DOWN arrows, to cycle through matches.

grc can be used to colourise logfiles, output of shell commands, arbitrary text, etc. Many shell commands are supported out of the box.

You might want to add these lines you your ~/.bashrc:

GRC_ALIASES=true
source $GUIX_ENVIRONMENT:-$HOME/.guix-profile/etc/profile.d/grc.sh

The fzf-tab package replaces the default completion menu of the zsh shell with fzf, enabling fuzzy finding and multi-selection.