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GNU Wget is a free software package for retrieving files via HTTP, HTTPS, FTP and FTPS. It is a non-interactive command-line tool that can be called from scripts, cron jobs or terminals. Features include resuming aborted downloads, recursive mirroring, HTTP proxies and cookies, and operation on UNIX-like systems and Microsoft Windows. It is distributed under the GNU General Public License.
GnuPG is a free implementation of the OpenPGP standard, allowing users to encrypt and sign data and communications. It includes a key management system, access modules for public key directories, and support for S/MIME and Secure Shell. It is a command line tool with frontend applications and libraries available, and it can be freely used, modified and distributed under the GNU General Public License.
gopass is a command-line password manager for developers and power users. It manages passwords, secrets and credentials from the terminal, uses Git for versioning and GPG for encryption, and stores data locally. It supports multi-user sharing and is described as free and open-source, with extensions for browser integration, Git credentials and breach checks.
OCaml-GPR is an OCaml library for Gaussian process regression that includes a command line application and an example application. It implements approximation algorithms for scalable regression with arbitrary covariance functions.
Gut is a user-friendly Git command-line client for Windows, macOS and GNU/Linux, built with Golang. It provides commands such as Save, Ignore, Revert, Undo and Sync, and is fully compatible with Git, allowing switching between the two. It saves credentials in the system keychain and can use GitHub or GitLab to diff changes.
HDRMerge is a free tool that creates raw images with extended dynamic range from exposure-bracketed raw files or a single raw file containing multiple frames. It imports formats supported by LibRaw and outputs DNG 1.4 images with floating point data. It offers a GUI for removing ghosts and a command line interface for batch processing.
HidHide is an input device firewall that blocks individual applications from accessing HID and XInput devices, allowing controller inputs to be re-routed and re-mapped. It is inspired by HidGuardian but written from scratch, and ships with a client UI, a command-line interface and driver access for developers.
Homebrew is a package manager that installs command-line tools and applications across macOS, Linux and WSL. It installs each package into its own keg inside the Cellar and symlinks files into a prefix path. Packages are formulae that build from upstream source or casks that install pre-built binaries, and a Brewfile can describe a desired state.
HowToLinux is an open‑source website that provides Linux tutorials, customization guides, and tips. It includes a search function and is community‑driven, allowing contributions and edits. The content is released under the MIT license.
ImageMagick is a free, open-source software suite for creating, editing, converting and manipulating images. It supports over 200 format variants, including JPEG, PNG, GIF, TIFF, WebP and AVIF. The command-line tools run single-file conversions or multi-step processing pipelines. Bindings exist for C, C++, Python, .NET and Node.js.
A program for browsing and downloading from imageboards, with tabs for simultaneous searches and combined results from multiple sources in one tab. It can download thousands of images at once, save them using custom filename formats, and be extended with additional imageboards. A command-line interface is available from version 4.0.0.
Instaloader is a free open source command line tool written in Python that downloads pictures, videos, captions and other metadata from Instagram. It downloads public and private profiles, hashtags, stories, feeds and saved media, and automatically resumes interrupted download iterations. The documentation states it is not affiliated with or endorsed by Instagram.
IP Lookup at ifconfig.me displays the visitor's IP address along with connection details such as user agent, language, referer, method, encoding, MIME type, charset and X-Forwarded-For. It also offers a command line interface for retrieving this information via curl.
kmon is a Linux kernel manager and activity monitor available through Cargo, Arch Linux, Nixpkgs, Alpine Linux and Docker, with a manual installation option. The site also provides background on kernel function and design.
Kopia is an open-source backup and restore tool. It creates encrypted snapshots of designated files and directories and saves them to cloud, network, or local storage. It offers command-line and graphical interfaces and supports compression, deduplication, and error correction.
Lesma is a simple paste application that works with both a browser and the command line. It is written in Rust and the project is published under the GNU General Public License v3.0 or later.
libimobiledevice is a cross-platform free software library written in C that implements native protocols for communicating with iPhone, iPod Touch, iPad and Apple TV devices running iOS, without jailbreaking. It includes command-line utilities and has been built and run on Linux, Mac, Windows, Android and embedded ARM SoCs.
The Libra Toolkit is a collection of algorithms for learning and inference with discrete probabilistic models, including Bayesian networks, Markov networks, dependency networks, sum-product networks and arithmetic circuits. Each algorithm is implemented as a command-line program with consistent options and file formats, and all methods are written in OCaml.
LibrePCB is a free, open-source, cross-platform electronic design automation suite for drawing schematics and designing printed circuit boards. It offers a schematic editor and board editor, a semantic library concept, human-readable file formats, and optional library manager and PCB fabrication service. A command-line tool supports headless checks and data exports. It is available in 15 languages and can be used fully offline.
LibreQoS Test helps test internet speed, latency, and connection quality from a browser or command line.
Linux Roadmap is a step-by-step guide to learning Linux in 2026, hosted on the roadmap.sh platform. roadmap.sh provides community-created roadmaps, best practices, projects, articles, resources, and learning journeys to help users select career paths and develop professional skills.
Maestral is an open source Dropbox client for macOS and Linux. It offers a command line interface, a lightweight native GUI for macOS and a Qt-based interface for Linux, and can sync multiple Dropbox accounts. It supports .mignore patterns to exclude local files from syncing. As of June 2026, Maestral is no longer actively maintained.
The Arch Linux manual pages website (man.archlinux.org) is a repository of manual pages from Arch Linux packages. It contains 83,516 manual pages and 8,793 symbolic links sourced from 3,776 packages, while 11,705 packages lack indexable manual pages. The site organizes pages into traditional sections and provides search forms to locate pages by name, description, or package.
MediaInfo is a tool that displays technical and tag data for video and audio files. It shows container, video, audio, text and chapter details, and supports formats including MPEG-4, Matroska, AVI, H.264 and MP3. It is available with a graphical interface, command line interface or library version, and is open-source software.
