GNU/MIT Scheme is an implementation of the Scheme programming language. It provides an interpreter, a compiler and a debugger. It also features an integrated Emacs-like editor and a large runtime library.

Owl Lisp is a simple programming language. It is intended to provide a portable system for writing standalone programs in a subjectively pleasant dialect of Lisp. It has a minimal core and runtime, purely functional operation, and support for asynchronous evaluation.

STklos is a free Scheme system mostly compliant with the languages features defined in R7RS small. The aim of this implementation is to be fast as well as light. The implementation is based on an ad-hoc Virtual Machine. STklos can also be compiled as a library and embedded in an application.

TinyScheme is a light-weight Scheme interpreter that implements as large a subset of R5RS as was possible without getting very large and complicated.

It's meant to be used as an embedded scripting interpreter for other programs. As such, it does not offer an Integrated Development Environment (IDE) or extensive toolkits, although it does sport a small (and optional) top-level loop.

As an embedded interpreter, it allows multiple interpreter states to coexist in the same program, without any interference between them. Foreign functions in C can be added and values can be defined in the Scheme environment. Being quite a small program, it is easy to comprehend, get to grips with, and use.

Pre-Scheme is a statically compilable dialect of Scheme, used to implement the Scheme 48 virtual machine. Scheme 48 ships with a Pre-Scheme to C compiler written in Scheme, and a runtime library which allows Pre-Scheme code to run as Scheme.

Gauche is a R7RS Scheme scripting engine aiming at being a handy tool that helps programmers and system administrators to write small to large scripts quickly. Quick startup, built-in system interface, native multilingual support are some of the goals. Gauche comes with a package manager/installer gauche-package which can download, compile, install and list gauche extension packages.

SLIB is a portable Scheme library providing compatibility and utility functions for all standard Scheme implementations.

Gerbil mode provides font-lock, indentation, navigation, and REPL for Gerbil code within Emacs.

abduco provides session management i.e. it allows programs to be run independently from their controlling terminal. That is, programs can be detached---run in the background---and then later reattached.

reptyr is a utility for taking an existing running program and attaching it to a new terminal. Started a long-running process over ssh, but have to leave and don't want to interrupt it? Just start a screen, use reptyr to grab it, and then kill the ssh session and head on home.

dtach is a tiny program that emulates the detach feature of screen, allowing you to run a program in an environment that is protected from the controlling terminal and attach to it later.

GNU Screen is a terminal window manager that multiplexes a single terminal between several processes. The virtual terminals each provide features such as a scroll-back buffer and a copy-and-paste mechanism. Screen then manages the different virtual terminals, allowing you to easily switch between them, to detach them from the current session, or even splitting the view to show two terminals at once.

Byobu is a Japanese term for decorative, multi-panel screens that serve as folding room dividers. The Byobu software includes an enhanced profile, configuration utilities, and system status notifications for the GNU Screen window manager as well as the Tmux terminal multiplexer.

Scribus is a desktop publishing (DTP) application and can be used for many tasks; from brochure design to newspapers, magazines, newsletters and posters to technical documentation. Scribus supports professional DTP features, such as CMYK color and a color management system to soft proof images for high quality color printing, flexible PDF creation options, Encapsulated PostScript import/export and creation of four color separations, import of EPS/PS and SVG as native vector graphics, Unicode text including right to left scripts such as Arabic and Hebrew via FreeType.

sg3-utils is a collection of utilities for devices that use the Small Computer System Interface (SCSI) command set. It includes utilities to read data from, write data to, control, modify, and query the state of SCSI devices.

For example, this package provides command-line tools to:

• copy data based on dd syntax and semantics (called sg_dd, sgp_dd, and sgm_dd)

• check INQUIRY data and VPD pages (sg_inq)

• check mode and log pages (sginfo, sg_modes, and sg_logs)

• spin up and down disks (sg_start)

• do self-tests (sg_senddiag)

• parse sense data (sg_decode_sense)

• and perform various other functions.

In addition, this package includes a library, called libsgutils, which can be used in C and C++ programs to interact with SCSI devices.

lsscsi lists SCSI logical units or SCSI targets. It can also list NVMe namespaces or controllers and show the relationship between a device's primary node name, its SCSI generic (sg) node name and its kernel name.

Libiscsi is a client-side library to implement the iSCSI protocol that can be used to access the resources of an iSCSI target. It is fully asynchronous with regards to iSCSI commands and SCSI tasks, but a synchronous layer is also provided for ease of use for simpler applications.

Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware.

This library is a wrapper around the Pango library. It allows you to use TrueType fonts to render internationalized and tagged text in SDL applications.

SDL_mixer is a multi-channel audio mixer library for SDL. It supports any number of simultaneously playing channels of 16 bit stereo audio, plus a single channel of music. Supported formats include FLAC, MOD, MIDI, Ogg Vorbis, and MP3.

This package supports two MIDI backends, selectable at runtime. To use the newer fluidsynth library, install a soundfont such as fluid-3 and specify it using the SDL_SOUNDFONTS environment variable. For the legacy timidity backend, install a patch set such as freepats and set the path to the configuration file with TIMIDITY_CFG.

SDL_mixer is a multi-channel audio mixer library for SDL. It supports any number of simultaneously playing channels of 16 bit stereo audio, plus a single channel of music. Supported formats include FLAC, MOD, MIDI, Ogg Vorbis, and MP3.

This package supports two MIDI backends, selectable at runtime. To use the newer fluidsynth library, install a soundfont such as fluid-3 and specify it using the SDL_SOUNDFONTS environment variable. For the legacy timidity backend, install a patch set such as freepats and set the path to the configuration file with TIMIDITY_CFG.

Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware. This package is a compatibility layer; it provides a binary and source compatible API for programs written against SDL2, but it uses SDL3 behind the scenes.

Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware. This package is a compatibility layer; it provides a binary and source compatible API for programs written against SDL 1.2, but it uses SDL 2.0 behind the scenes.

Guile-SDL2 provides Guile Scheme bindings for the SDL2 C shared library. The bindings are written in pure Scheme using Guile's foreign function interface.