Best Open-Source CLI Tools in 2026

This category lists open-source CLI tools for terminals, scripting, and day-to-day workflows. Curl transfers data over many URL protocols from the command line. Glow renders Markdown in the terminal, and Atuin adds searchable shell history with context. Browse when you want a focused utility that stays in the shell.

The most popular open-source CLI tool by GitHub stars is Oh My Zsh(186.1k stars), followed by Yt-dlp(156.2k stars)and Claude Code(112.6k stars). This page lists the top 30 of 51 cli tools in the directory, ranked by community adoption.

Quick comparison

Best open-source CLI tools in 2026, ranked by GitHub stars
#ToolStarsLanguageLicense
1Oh My Zsh

A delightful community-driven framework for managing your Zsh configuration, with over 2,400 contributors, 300+ plugins, and 140+ themes.

186.1kShellMIT License
2Yt-dlp

A feature-rich command-line tool for downloading audio and video from YouTube and other sites.

156.2kPythonThe Unlicense
3Claude Code

Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you code faster by executing routine tasks, explaining complex code, and handling git workflows - all through natural language commands.

112.6kShell
4Tabby

Tabby is a modern, highly customizable terminal emulator that supports SSH, serial, Telnet, and more. It features a polished user interface, cross-platform compatibility, and robust plugin support to enhance your command-line workflow.

67.6kTypeScriptMIT License
5Tldr

Collaborative cheatsheets for console commands. Simplifying the man pages with practical examples.

62.1kMarkdownOther
6Starship

A minimal, blazing-fast, and infinitely customizable prompt for any shell.

56.2kRustISC License
7Gpt-engineer

A CLI platform designed for experimenting with code generation, paving the way for advanced development workflows.

53.4kPythonMIT License
8HackingTool

A comprehensive all-in-one hacking tool designed for hackers, providing a variety of features for security testing and exploitation.

51.9kPythonMIT License
9Zx

A tool from Google for writing better and simpler scripts using JavaScript-like syntax, enhancing productivity and script readability.

45.4kJavaScriptApache License 2.0
10Curl

A versatile command line tool and library (libcurl) for transferring data with URLs. Supports protocols including HTTP, HTTPS, FTP, FTPS, SCP, SFTP, LDAP, SMB, SMTP, POP3, IMAP, MQTT, RTSP, and many more. Widely used for network troubleshooting, automation, and data transfer for developers and system administrators.

41.3kCOther

All 30 CLI tools

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Frequently asked questions

What is the best open-source cli tool in 2026?

Oh My Zsh leads by GitHub stars(186.1k). A delightful community-driven framework for managing your Zsh configuration, with over 2,400 contributors, 300+ plugins, and 140+ themes.

Are these cli tools free?

Yes. Every tool on this list is open source and free to use in your own projects. Many can be self-hosted.

How is this list ranked?

Tools are ranked by GitHub star count, a strong proxy for community adoption and active maintenance. Star counts are refreshed regularly.

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