Scheme 48 is an implementation of Scheme based on a byte-code interpreter and is designed to be used as a testbed for experiments in implementation techniques and as an expository tool.

Chibi-Scheme is a very small library with no external dependencies intended for use as an extension and scripting language in C programs. In addition to support for lightweight VM-based threads, each VM itself runs in an isolated heap allowing multiple VMs to run simultaneously in different OS threads.

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.

Scheme 9 from Empty Space (S9fES) is a mature, portable, and comprehensible public-domain interpreter for R4RS Scheme offering:

• bignum arithmetics

• decimal-based real number arithmetics

• support for low-level Unix programming

• cursor addressing with Curses

• basic networking procedures

• an integrated online help system

• loads of useful library functions

This is a R7RS Scheme implementation designed to run within a Common Lisp environment.

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.

HOP is a multi-tier programming language for the Web 2.0 and the so-called diffuse Web. It is designed for programming interactive web applications in many fields such as multimedia (web galleries, music players, ...), ubiquitous and house automation (SmartPhones, personal appliance), mashups, office (web agendas, mail clients, ...), etc.

Revised^7 Report of the Algorithmic Language Scheme adapted to Texinfo format.

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.

Bigloo is a Scheme implementation devoted to one goal: enabling Scheme based programming style where C(++) is usually required. Bigloo attempts to make Scheme practical by offering features usually presented by traditional programming languages but not offered by Scheme and functional programming. Bigloo compiles Scheme modules. It delivers small and fast stand alone binary executables. Bigloo enables full connections between Scheme and C programs and between Scheme and Java programs.

femtolisp is a scheme-like lisp implementation with a simple, elegant Scheme dialect. It is a lisp-1 with lexical scope. The core is 12 builtin special forms and 33 builtin functions.

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

TR7 is a lightweight Scheme interpreter that implements the revision R7RS small of scheme programming language.

It is meant to be used as an embedded scripting interpreter for other programs. A lot of functionality in TR7 is included conditionally, to allow developers freedom in balancing features and footprint.

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.

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.

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.

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.

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.

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.

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.

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.

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.

MikMod is able to play a wide range of module formats, as well as digital sound files. It can take advantage of particular features of your system, such as sound redirection over the network.

SDL_image is an image file loading library for SDL that supports the following formats: BMP, GIF, JPEG, LBM, PCX, PNG, PNM, TGA, TIFF, WEBP, XCF, XPM, and XV.