Command-line tools: S

• s-search

  Web search from the terminal

• s2n

  Implementation of the TLS/SSL protocols

• s3cmd

  Command-line tool for the Amazon S3 service

• s5cmd

  Parallel S3 and local filesystem execution tool

• sad

  CLI search and replace | Space Age seD

• safety

  Checks Python dependencies for known vulnerabilities and suggests remediations

• samba

  SMB/CIFS file, print, and login server for UNIX

• saml2aws

  Login and retrieve AWS temporary credentials using a SAML IDP

• samply

  CLI sampling profiler

• samtools

  Tools for manipulating next-generation sequencing data

• sandvault

  Run AI agents isolated in a sandboxed macOS user account

• sane-backends

  Backends for scanner access

• sanity

  Command-line interface for Sanity

• sapling

  Source control client

• saxon

  XSLT and XQuery processor

• sbcl

  Steel Bank Common Lisp system

• sbt

  Build tool for Scala projects

• sc-im

  Spreadsheet program for the terminal, using ncurses

• scala

  JVM-based programming language

• scala@2.12

  JVM-based programming language

• scala@2.13

  JVM-based programming language

• scalapack

  High-performance linear algebra for distributed memory machines

• scalingo

  CLI for working with Scalingo's PaaS

• scc

  Fast and accurate code counter with complexity and COCOMO estimates

• sccache

  Used as a compiler wrapper and avoids compilation when possible

• scdl

  Command-line tool to download music from SoundCloud

• scdoc

  Small man page generator

• schemathesis

  Testing tool for web applications with specs

• scikit-image

  Image processing in Python

• scip

  Solver for mixed integer programming and mixed integer nonlinear programming

• scipy

  Software for mathematics, science, and engineering

• scons

  Substitute for classic 'make' tool with autoconf/automake functionality

• scooter

  Interactive find and replace in the terminal

• scorecard

  Security health metrics for Open Source

• scoutsuite

  Open source multi-cloud security-auditing tool

• scrapy

  Web crawling & scraping framework

• scrcpy

  Display and control your Android device

• screen

  Terminal multiplexer with VT100/ANSI terminal emulation

• screenfetch

  Generate ASCII art with terminal, shell, and OS info

• screenresolution

  Get, set, and list display resolution

• scummvm

  Graphic adventure game interpreter

• scw

  Command-line Interface for Scaleway

• sd

  Intuitive find & replace CLI

• sdcc

  ANSI C compiler for Intel 8051, Maxim 80DS390, and Zilog Z80

• sdl12-compat

  SDL 1.2 compatibility layer that uses SDL 2.0 behind the scenes

• sdl2_gfx

  SDL2 graphics drawing primitives and other support functions

• sdl2_image

  Library for loading images as SDL surfaces and textures

• sdl2_mixer

  Sample multi-channel audio mixer library

• sdl2_net

  Small sample cross-platform networking library

• sdl2_ttf

  Library for using TrueType fonts in SDL applications

• sdl2-compat

  SDL2 compatibility layer that uses SDL3 behind the scenes

• sdl3

  Low-level access to audio, keyboard, mouse, joystick, and graphics

• sdl3_image

  Library for loading images as SDL surfaces and textures

• sdl3_mixer

  Sample multi-channel audio mixer library

• sdl3_ttf

  Library for using TrueType fonts in SDL applications

• seaweedfs

  Fast distributed storage system

• secp256k1

  Optimized C library for EC operations on curve secp256k1

• secretspec

  Declarative secrets management tool

• selene

  Blazing-fast modern Lua linter

• selenium-server

  Browser automation for testing purposes

• sem-cli

  Semantic version control CLI with entity-level diffs and blame

• semgrep

  Easily detect and prevent bugs and anti-patterns in your codebase

• semver

  Semantic version parser for node (the one npm uses)

• sendme

  Tool to send files and directories, based on iroh

• sentencepiece

  Unsupervised text tokenizer and detokenizer

• seqkit

  Cross-platform and ultrafast toolkit for FASTA/Q file manipulation in Golang

• sequoia-sq

  Sequoia-PGP command-line tool

• serie

  Rich git commit graph in your terminal

• serve

  Static http server anywhere you need one

• sesh

  Smart session manager for the terminal

• sevenzip

  7-Zip is a file archiver with a high compression ratio

• sf

  Command-line toolkit for Salesforce development

• sfcgal

  C++ wrapper library around CGAL

• sfml

  Multi-media library with bindings for multiple languages

• sfml@2

  Multi-media library with bindings for multiple languages

• sftpgo

  Fully featured SFTP server with optional HTTP/S, FTP/S and WebDAV support

• sha3sum

  Keccak, SHA-3, SHAKE, and RawSHAKE checksum utilities

• shadcn

  CLI for adding components to your project

• shaderc

  Collection of tools, libraries, and tests for Vulkan shader compilation

• shadowsocks-libev

  Libev port of shadowsocks

• shadowsocks-rust

  Rust port of Shadowsocks

• shairport-sync

  AirTunes emulator that adds multi-room capability

• shared-mime-info

  Database of common MIME types

• shc

  Shell Script Compiler

• sheets

  Terminal based spreadsheet tool

• sheldon

  Fast, configurable, shell plugin manager

• shellcheck

  Static analysis and lint tool, for (ba)sh scripts

• shellspec

  BDD unit testing framework for dash, bash, ksh, zsh and all POSIX shells

• sherlock

  Hunt down social media accounts by username

• shfmt

  Autoformat shell script source code

• shntool

  Multi-purpose tool for manipulating and analyzing WAV files

• shodan

  Python library and command-line utility for Shodan

• showcert

  X.509 TLS certificate reader and creator

• showkey

  Simple keystroke visualizer

• shtool

  GNU's portable shell tool

• siege

  HTTP regression testing and benchmarking utility

• signal-cli

  CLI and dbus interface for WhisperSystems/libsignal-service-java

• sigrok-cli

  Sigrok command-line interface to use logic analyzers and more

• sigstore

  Codesigning tool for Python packages

• silicon

  Create beautiful image of your source code

• simdjson

  SIMD-accelerated C++ JSON parser

• simdutf

  Unicode conversion routines, fast

• simg2img

  Tool to convert Android sparse images to raw images and back

• sing-box

  Universal proxy platform

• singular

  Computer algebra system for polynomial computations

• sip

  Tool to create Python bindings for C and C++ libraries

• sipp

  Traffic generator for the SIP protocol

• sipsak

  SIP Swiss army knife

• siril

  Astronomical image processing tool

• sk

  Fuzzy Finder in rust!

• skaffold

  Easy and Repeatable Kubernetes Development

• skills

  Open agent skills ecosystem

• skillshare

  Sync skills across AI CLI tools

• skip

  Tool for building Swift apps for Android

• skopeo

  Work with remote images registries

• sl

  Prints a steam locomotive if you type sl instead of ls

• slackdump

  Export Slack data without admin privileges

• sleepwatcher

  Monitors sleep, wakeup, and idleness of a Mac

• sleuthkit

  Forensic toolkit

• slides

  Terminal based presentation tool

• slirp4netns

  User-mode networking for unprivileged network namespaces

• slither-analyzer

  Solidity static analysis framework written in Python 3

• slumber

  Terminal-based HTTP/REST client

• smartmontools

  SMART hard drive monitoring

• smlfmt

  Custom parser and code formatter for Standard ML

• smlnj

  Compiler and programming system for Standard ML

• smug

  Automate your tmux workflow

• snakefmt

  Snakemake code formatter

• snakemake

  Pythonic workflow system

• snap

  Tool to work with .snap files

• snapcast

  Synchronous multiroom audio player

• snapcraft

  Package any app for every Linux desktop, server, cloud or device

• snappy

  Compression/decompression library aiming for high speed

• sngrep

  Command-line tool for displaying SIP calls message flows

• sniffnet

  Cross-platform application to monitor your network traffic

• snitch

  Prettier way to inspect network connections

• snort

  Flexible Network Intrusion Detection System

• snowflake

  Pluggable Transport using WebRTC, inspired by Flashproxy

• snowflake-cli

  CLI for snowflake

• snyk-agent-scan

  Constrain, log and scan your MCP connections for security vulnerabilities

• snyk-cli

  Scans and monitors projects for security vulnerabilities

• soapyhackrf

  SoapySDR HackRF module

• soapyrtlsdr

  SoapySDR RTL-SDR Support Module

• soapysdr

  Vendor and platform neutral SDR support library

• socat

  SOcket CAT: netcat on steroids

• socket_vmnet

  Daemon to provide vmnet.framework support for rootless QEMU

• socktainer

  Docker-compatible REST API on top of Apple container

• sofka

  Kubernetes TUI, reimagined in Rust

• softhsm

  Cryptographic store accessible through a PKCS#11 interface

• solana

  Web-Scale Blockchain for decentralized apps and marketplaces

• solargraph

  Ruby language server

• solc-select

  Manage multiple Solidity compiler versions

• solidity

  Contract-oriented programming language

• solr

  Enterprise search platform from the Apache Lucene project

• somo

  Human-friendly alternative to netstat for socket and port monitoring

• sonar-scanner

  Launcher to analyze a project with SonarQube

• sonic

  Fast, lightweight & schema-less search backend

• sops

  Editor of encrypted files

• source-highlight

  Source-code syntax highlighter

• sourcekitten

  Framework and command-line tool for interacting with SourceKit

• sourcery

  Meta-programming for Swift, stop writing boilerplate code

• sox

  SOund eXchange: universal sound sample translator

• sox_ng

  Sound eXchange NG

• spaceship

  Zsh prompt for Astronauts

• spack

  Package manager that builds multiple versions and configurations of software

• spark

  Sparklines for the shell

• spatialindex

  General framework for developing spatial indices

• spatialite-tools

  CLI tools supporting SpatiaLite

• spdlog

  Super fast C++ logging library

• specify

  Toolkit to help you get started with Spec-Driven Development

• spectra

  Header-only C++ library for large scale eigenvalue problems

• spectral-cli

  JSON/YAML linter and support OpenAPI v3.1/v3.0/v2.0, and AsyncAPI v2.x

• speech

  On-device speech toolkit for Apple Silicon: ASR, TTS, VAD, diarization

• speex

  Audio codec designed for speech

• speexdsp

  Speex audio processing library

• spek

  Acoustic spectrum analyser

• sphinx-doc

  Tool to create intelligent and beautiful documentation

• spice-gtk

  GTK client/libraries for SPICE

• spice-protocol

  Headers for SPICE protocol

• spice-server

  Implements the server side of the SPICE protocol

• spicetify-cli

  Command-line tool to customize Spotify client

• spidermonkey

  JavaScript-C Engine

• spirv-cross

  Performing reflection and disassembling SPIR-V

• spirv-headers

  Headers for SPIR-V

• spirv-llvm-translator

  Tool and a library for bi-directional translation between SPIR-V and LLVM IR

• spirv-tools

  API and commands for processing SPIR-V modules

• sponge

  Soak up standard input and write to a file

• spoof-mac

  Spoof your MAC address in macOS

• spoofdpi

  Simple and fast anti-censorship tool written in Go

• spotbugs

  Tool for Java static analysis (FindBugs's successor)

• spotify_player

  Command driven spotify player

• spotifyd

  Spotify daemon

• sq

  Data wrangler with jq-like query language

• sql-formatter

  Whitespace formatter for different query languages

• sqlc

  Generate type safe Go from SQL

• sqlcipher

  SQLite extension providing 256-bit AES encryption

• sqlcmd

  Microsoft SQL Server command-line interface

• sqldiff

  Displays the differences between SQLite databases

• sqlfluff

  SQL linter and auto-formatter for Humans

• sqlite

  Command-line interface for SQLite

• sqlite-rsync

  SQLite remote copy tool

• sqlite-utils

  CLI utility for manipulating SQLite databases

• sqlmap

  Penetration testing for SQL injection and database servers

• sqlparse

  Non-validating SQL parser

• sqlx-cli

  Command-line utility for SQLx, the Rust SQL toolkit

• sqruff

  Fast SQL formatter/linter

• squashfs

  Compressed read-only file system for Linux

• squid

  Advanced proxy caching server for HTTP, HTTPS, FTP, and Gopher

• sratoolkit

  Data tools for INSDC Sequence Read Archive

• srecord

  Tools for manipulating EPROM load files

• srt

  Secure Reliable Transport

• srtp

  Implementation of the Secure Real-time Transport Protocol

• ssh-audit

  SSH server & client auditing

• ssh-copy-id

  Add a public key to a remote machine's authorized_keys file

• ssh-vault

  Encrypt/decrypt using SSH keys

• sshfs

  File system client based on SSH File Transfer Protocol

• sshpass

  Non-interactive SSH password auth

• sshs

  Graphical command-line client for SSH

• sshuttle

  Proxy server that works as a poor man's VPN

• sslscan

  Test SSL/TLS enabled services to discover supported cipher suites

• sstp-client

  SSTP (Microsoft's Remote Access Solution for PPP over SSL) client

• standardebooks

  Tools for producing ebook files

• starship

  Cross-shell prompt for astronauts

• staticcheck

  State of the art linter for the Go programming language

• steampipe

  Use SQL to instantly query your cloud services

• stellar-cli

  Stellar command-line tool for interacting with the Stellar network

• step

  Crypto and x509 Swiss-Army-Knife

• stern

  Tail multiple Kubernetes pods & their containers

• stlink

  STM32 discovery line Linux programmer

• stm32flash

  Open source flash program for STM32 using the ST serial bootloader

• stockfish

  Strong open-source chess engine

• storj-uplink

  Uplink CLI for the Storj network

• stow

  Organize software neatly under a single directory tree (e.g. /usr/local)

• strace

  Diagnostic, instructional, and debugging tool for the Linux kernel

• strands-agents-sops

  Standard Operating Procedures for AI agents using natural language

• streamlink

  CLI for extracting streams from various websites to a video player

• streamrip

  Scriptable music downloader for Qobuz, Tidal, SoundCloud, and Deezer

• stress

  Tool to impose load on and stress test a computer system

• stress-ng

  Stress test a computer system in various selectable ways

• stripe-cli

  Command-line tool for Stripe

• strongswan

  VPN based on IPsec

• stunnel

  SSL tunneling program

• stylelint

  Modern CSS linter

• stylish-haskell

  Haskell code prettifier

• stylua

  Opinionated Lua code formatter

• subfinder

  Subdomain discovery tool

• subliminal

  Library to search and download subtitles

• subnetcalc

  IPv4/IPv6 subnet calculator

• subversion

  Version control system designed to be a better CVS

• sui

  Next-generation smart contract platform powered by the Move programming language

• suite-sparse

  Suite of Sparse Matrix Software

• summarize

  Multi-modal AI tool to extract and summarize content

• sundials

  Nonlinear and differential/algebraic equations solver

• supabase

  Postgres development platform

• supabase-mcp-server

  MCP Server for Supabase

• superfile

  Modern and pretty fancy file manager for the terminal

• superhtml

  HTML Language Server & Templating Language Library

• supermodel

  Sega Model 3 arcade emulator

• superseedr

  BitTorrent Client in your Terminal

• supertux

  Classic 2D jump'n run sidescroller game

• supervisor

  Process Control System

• surfer

  Waveform viewer, supporting VCD, FST, or GHW format

• suricata

  Network IDS, IPS, and security monitoring engine

• svgo

  Nodejs-based tool for optimizing SVG vector graphics files

• svt-av1

  AV1 encoder

• svtplay-dl

  Download videos from https://www.svtplay.se/

• svu

  Semantic version utility

• swag

  Automatically generate RESTful API documentation with Swagger 2.0 for Go

• swagger-codegen

  Generate clients, server stubs, and docs from an OpenAPI spec

• swaks

  SMTP command-line test tool

• swc

  Super-fast Rust-based JavaScript/TypeScript compiler

• swi-prolog

  ISO/Edinburgh-style Prolog interpreter

• swift

  High-performance system programming language

• swift-format

  Formatting technology for Swift source code

• swift-outdated

  Check for outdated Swift package manager dependencies

• swift-protobuf

  Plugin and runtime library for using protobuf with Swift

• swift-sh

  Scripting with easy zero-conf dependency imports

• swiftformat

  Formatting tool for reformatting Swift code

• swiftgen

  Swift code generator for assets, storyboards, Localizable.strings, etc.

• swiftlint

  Tool to enforce Swift style and conventions

• swiftly

  Swift toolchain installer and manager

• swig

  Generate scripting interfaces to C/C++ code

• switchaudio-osx

  Change macOS audio source from the command-line

• swtpm

  Software TPM Emulator based on libtpms

• syft

  CLI for generating a Software Bill of Materials from container images

• symfony-cli

  Build, run, and manage Symfony applications

• syncthing

  Open source continuous file synchronization application

• synfig

  Command-line renderer

• sysbench

  System performance benchmark tool

• sysdig

  System-level exploration and troubleshooting tool

• syslog-ng

  Log daemon with advanced processing pipeline and a wide range of I/O methods

• systemc

  Core SystemC language and examples

• systemd

  System and service manager

• syswatch

  Cross-platform system diagnostics TUI

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