Command-line tools: R

• r

  Software environment for statistical computing

• rabbitmq

  Messaging and streaming broker

• rabbitmq-c

  C AMQP client library for RabbitMQ

• radare2

  Reverse engineering framework

• rage

  Simple, modern, secure file encryption

• ragel

  State machine compiler

• railway

  Develop and deploy code with zero configuration

• rainfrog

  Database management TUI for PostgreSQL/MySQL/SQLite

• rakudo

  Mature, production-ready implementation of the Raku language

• rakudo-star

  Rakudo compiler and commonly used packages

• ralph-orchestrator

  Multi-agent orchestration framework for autonomous AI task completion

• ramalama

  Goal of RamaLama is to make working with AI boring

• rancher-cli

  Unified tool to manage your Rancher server

• ranger

  File browser

• rapid-mlx

  Fast local AI engine for Apple Silicon with an OpenAI-compatible API

• rapidjson

  JSON parser/generator for C++ with SAX and DOM style APIs

• rasterio

  Reads and writes geospatial raster datasets

• rattler-build

  Universal conda package builder

• rattler-index

  Index conda channels using rattler

• rav1e

  Fastest and safest AV1 video encoder

• raylib

  Simple and easy-to-use library to learn videogames programming

• rbenv

  Ruby version manager

• rbenv-bundler

  Makes shims aware of bundle install paths

• rbenv-gemset

  KISS yet powerful gem/set management for curious engineers and Ruby hackers

• rbspy

  Sampling profiler for Ruby

• rbw

  Unofficial Bitwarden CLI client

• rclone

  Rsync for cloud storage

• rcm

  RC file (dotfile) management

• rdap

  Command-line client for the Registration Data Access Protocol

• rdfind

  Find duplicate files based on content (NOT file names)

• rdkit

  Open-source chemoinformatics library

• re2

  Alternative to backtracking PCRE-style regular expression engines

• re2c

  Generate C-based recognizers from regular expressions

• readline

  Library for command-line editing

• readsb

  ADS-B decoder swiss knife

• reattach-to-user-namespace

  Reattach process (e.g., tmux) to background

• rebar3

  Erlang build tool

• recc

  Remote Execution Caching Compiler

• recode

  Convert character set (charsets)

• recon-ng

  Web Reconnaissance Framework

• redis

  Persistent key-value database, with built-in net interface

• redis@8.2

  Persistent key-value database, with built-in net interface

• redocly-cli

  Your all-in-one OpenAPI utility

• redress

  Tool for analyzing stripped Go binaries compiled with the Go compiler

• regal

  Linter and language server for Rego

• regclient

  Docker and OCI Registry Client in Go and tooling using those libraries

• release-it

  Generic CLI tool to automate versioning and package publishing related tasks

• remarshal

  Convert between TOML, YAML and JSON

• remind

  Sophisticated calendar and alarm

• rename

  Perl-powered file rename script with many helpful built-ins

• render

  Command-line interface for Render

• renovate

  Automated dependency updates. Flexible so you don't need to be

• reorder-python-imports

  Rewrites source to reorder python imports

• repo

  Repository tool for Android development

• repomix

  Pack repository contents into a single AI-friendly file

• resterm

  Terminal client for .http/.rest files with HTTP, GraphQL, and gRPC support

• restic

  Fast, efficient and secure backup program

• restish

  CLI tool for interacting with REST-ish HTTP APIs

• resvg

  SVG rendering tool and library

• retry

  Repeat a command until the command succeeds

• reuse

  Tool for copyright and license recommendations

• revive

  Fast, configurable, extensible, flexible, and beautiful linter for Go

• rgbds

  Rednex GameBoy Development System

• rhash

  Utility for computing and verifying hash sums of files

• rich-cli

  Command-line toolbox for fancy output in the terminal

• rio-terminal

  Hardware-accelerated GPU terminal emulator powered by WebGPU

• ripgrep

  Search tool like grep and The Silver Searcher

• ripgrep-all

  Wrapper around ripgrep that adds multiple rich file types

• riscv64-elf-binutils

  GNU Binutils for riscv64-elf cross development

• riscv64-elf-gcc

  GNU compiler collection for riscv64-elf

• riscv64-elf-gdb

  GNU debugger for riscv64-elf cross development

• rizin

  UNIX-like reverse engineering framework and command-line toolset

• rlwrap

  Readline wrapper: adds readline support to tools that lack it

• rm-improved

  Command-line deletion tool focused on safety, ergonomics, and performance

• rmlint

  Extremely fast tool to remove dupes and other lint from your filesystem

• rmpc

  Terminal based Media Player Client with album art support

• rmux

  Terminal multiplexer with a tmux-style CLI and daemon runtime

• robot-framework

  Open source test framework for acceptance testing

• rocksdb

  Embeddable, persistent key-value store for fast storage

• rocq

  Proof assistant for higher-order logic

• rofi

  Window switcher, application launcher and dmenu replacement

• rojo

  Professional grade Roblox development tools

• rollup

  Next-generation ES module bundler

• rom-tools

  Tools for Multiple Arcade Machine Emulator

• root

  Analyzing petabytes of data, scientifically

• rootlesskit

  Linux-native "fake root" for implementing rootless containers

• rosa-cli

  RedHat OpenShift Service on AWS (ROSA) command-line interface

• roswell

  Lisp installer and launcher for major environments

• rover

  CLI for managing and maintaining data graphs with Apollo Studio

• rpds-py

  Python bindings to Rust's persistent data structures

• rpiboot

  Raspberry Pi USB boot tool for Compute Modules

• rpm

  Standard unix software packaging tool

• rpm2cpio

  Tool to convert RPM package to CPIO archive

• rqlite

  Lightweight, distributed relational database built on SQLite

• rrdtool

  Round Robin Database

• rsgain

  ReplayGain 2.0 tagging utility

• rswift

  Get strong typed, autocompleted resources like images, fonts and segues

• rsync

  Utility that provides fast incremental file transfer

• rsyslog

  Enhanced, multi-threaded syslogd

• rtabmap

  Visual and LiDAR SLAM library and standalone application

• rtk

  CLI proxy to minimize LLM token consumption

• rtl_433

  Program to decode radio transmissions from devices

• rtmidi

  API for realtime MIDI input/output

• rtmpdump

  Tool for downloading RTMP streaming media

• rtorrent

  Ncurses BitTorrent client based on libtorrent-rakshasa

• rubberband

  Audio time stretcher tool and library

• ruby

  Powerful, clean, object-oriented scripting language

• ruby-build

  Install various Ruby versions and implementations

• ruby-install

  Install Ruby, JRuby, Rubinius, TruffleRuby, or mruby

• ruby-lsp

  Opinionated language server for Ruby

• ruby@3.3

  Powerful, clean, object-oriented scripting language

• ruby@3.4

  Powerful, clean, object-oriented scripting language

• rubyfmt

  Ruby autoformatter

• ruff

  Extremely fast Python linter, written in Rust

• rulesync

  Unified AI rules management CLI tool

• rumdl

  Markdown Linter and Formatter written in Rust

• runit

  Collection of tools for managing UNIX services

• runme

  Execute commands inside your runbooks, docs, and READMEs

• rust

  Safe, concurrent, practical language

• rust-analyzer

  Experimental Rust compiler front-end for IDEs

• rust-parallel

  Run commands in parallel with Rust's Tokio framework

• rustic

  Fast, encrypted, and deduplicated backups powered by Rust

• rustledger

  Fast, pure Rust implementation of Beancount double-entry accounting

• rustls-ffi

  FFI bindings for the rustls TLS library

• rustnet

  Cross-platform network monitoring terminal UI with deep packet inspection

• rustscan

  Modern Day Portscanner

• rustup

  Rust toolchain installer

• rv

  Ruby version manager

• ryelang

  Rye is a homoiconic programming language focused on fluid expressions

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