The best free, open-source Mac apps for developers in 2026: clipboard manager Maccy, Rectangle, iTerm2, Stats, and more. All installable via Homebrew.
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Most of the best productivity tools on macOS cost nothing and live on GitHub. They are maintained by developers who had a problem, solved it, and shared the result. After years of testing productivity setups across different machines, these are the ten open-source Mac apps that have earned a permanent spot on every dev workstation.
1. Maccy : Open-Source Clipboard Manager for Mac
The macOS clipboard holds exactly one item. Copy something new and the previous entry is gone forever. For anyone juggling API keys, code snippets, URLs, and documentation references throughout a workday, that is a real productivity drain. Maccy is the cleanest fix available.
This open-source Mac clipboard manager runs as a tiny menu-bar app and automatically stores everything you copy in a searchable history. The default is 200 items, but you can push it to 500 or 1000 without any noticeable performance hit. Open it with ⌘⇧C, type a fragment of what you copied, and the item appears immediately. Maccy uses fuzzy matching, so dckr finds “Docker” and jsn finds “JSON”. No exact spelling required.
The shortcut system is where Maccy saves the most time. ⌘1 through ⌘9 paste the first nine items from your history without opening the panel at all. ⌥↩ (Option+Enter) pastes directly into the active app without a separate ⌘V. ⌥⇧↩ pastes as plain text, stripping fonts and formatting instantly. Pin any item with ⌥P and it stays at the top permanently, effectively turning the clipboard into a lightweight snippet library.
Privacy-conscious developers will appreciate that Maccy stores everything in a local SQLite database only. There is no cloud sync, no account, no telemetry, and no network access. The source is fully open on GitHub. For anything sensitive, the Ignore list in preferences silently excludes specific apps: add your password manager and those copied credentials never appear in the history. More at maccyapp.com/features.
brew install --cask maccy2. Rectangle : Window Snapping Without the Overhead
On a large monitor with multiple terminals, documentation tabs, and a browser open at once, manually resizing windows by dragging is a waste of seconds that add up. Rectangle gives macOS the keyboard-driven window snapping that Windows has had for years, without any subscription or setup overhead.
Snap any window to halves, thirds, quarters, or the full screen with configurable shortcuts. The most-used combos: ⌃⌥← left half, ⌃⌥→ right half, ⌃⌥↩ maximize. The moment you stop dragging windows you wonder how you tolerated it before. Rectangle is MIT-licensed, actively maintained, and has over 25,000 GitHub stars.
brew install --cask rectangle3. iTerm2 : The Mac Terminal Worth Actually Using
The built-in macOS Terminal is functional but austere. iTerm2 is the terminal most Mac developers end up settling on, and for good reason. Split panes for side-by-side terminal sessions, search with regex, inline images, a hotkey window that drops down from any app, and shell integration that tracks your working directory per session.
The profile system means you can keep different color schemes for production vs development environments, reducing the chance of running a destructive command in the wrong context. Trigger support lets you run scripts when specific output patterns appear. iTerm2 is GPL-licensed and has been the standard Mac terminal for over a decade.
brew install --cask iterm24. Stats : System Monitoring That Stays Out of the Way
Before reaching for Activity Monitor, most developers just want a quick read on what is consuming CPU or RAM right now. Stats puts compact live graphs in the menu bar: CPU, GPU, RAM, disk, network throughput, battery health, sensors. Click any to see a detailed breakdown.
Unlike older alternatives, Stats is Swift-native, actively maintained on GitHub, and lets you pick exactly which modules appear and in what order. The disk-read and network graphs are particularly useful while running large builds or database migrations. MIT licensed.
brew install --cask stats5. AltTab : Proper Window Switching on macOS
The native ⌘Tab switcher operates per application. If you have three Finder windows and two browser windows, ⌘Tab cannot distinguish between them. AltTab replaces it with a Windows-style switcher that shows every open window, with live thumbnail previews, and lets you tab directly to any one of them.
Customizable shortcut keys, configurable thumbnail size, and the option to filter by current Space. For developers running multiple code editors, terminal sessions, and browser windows simultaneously, this cuts a surprising amount of navigation time. GPL-licensed, 12k+ GitHub stars.
brew install --cask alt-tab6. MonitorControl : Brightness and Volume for External Displays
An external monitor connected via DisplayPort or HDMI does not respond to the native macOS brightness keys. MonitorControl solves this by sending DDC/CI commands to the display directly from the keyboard. It also matches audio output to whatever display is active, so the correct speakers change automatically when you switch monitors.
For developers on a multi-monitor desk, especially at night when ambient light changes, being able to hit the same brightness keys on any connected display without reaching for the OSD buttons saves more aggravation than it sounds. MIT licensed, over 26k GitHub stars.
brew install --cask monitorcontrol7. IINA : The Video Player macOS Deserved All Along
Developers frequently deal with screen recordings, demo videos, and format-specific test files. IINA plays everything: MKV, WebM, HEVC, AV1, older codecs that the built-in QuickTime refuses to open. It is built on mpv and designed specifically for macOS with a native SwiftUI interface, Dark Mode, Touch Bar support, and Picture-in-Picture.
Subtitle support is excellent for watching technical talks. The keyboard shortcut system mirrors mpv conventions. IINA is GPL-licensed and the most-recommended open-source video player for Mac in developer communities.
brew install --cask iina8. Keka : File Compression That Handles Everything
macOS can unzip a .zip file natively, but it cannot touch .7z, .tar.xz, .bz2, or encrypted archives. Keka handles all of them in a drag-and-drop interface. It also creates archives in almost any format and can split large archives for distribution.
For developers downloading assets, build artifacts, or compressed datasets in formats that Finder refuses to open, Keka eliminates the “unable to expand” error permanently. The GitHub version is fully free. MIT licensed, 4k+ GitHub stars.
brew install --cask keka9. Sequel Pro / TablePlus Alternative : Open-Source Database Client
Sequel Pro is the long-standing open-source MySQL client for Mac, and while its active development has slowed, it remains the fastest way to connect to a local MySQL or MariaDB instance and run ad-hoc queries without reaching for a terminal. For PostgreSQL, pgweb offers a similarly lightweight browser-based open-source client.
When you are debugging a migration or need to visually inspect table structure mid-sprint, a fast GUI client is faster than psql or mysql on the command line. Both are MIT licensed.
brew install --cask sequel-pro10. Cyberduck : S3, SFTP, and Cloud Storage in One Place
Cyberduck is a GPL-licensed file transfer client that covers SFTP, FTP, S3, Google Cloud Storage, Backblaze B2, Azure Blob, WebDAV, and more from a single interface. For developers managing remote servers, deploying static sites, or browsing object storage buckets without setting up the AWS CLI every time, it removes most of the setup friction.
The Cyberduck CLI (duck) works in scripts for automated transfers. The macOS app supports Keychain for credential storage and handles large transfers reliably. Over 14k GitHub stars.
brew install --cask cyberduckFinal thoughts
Every app on this list is free, open-source, and Homebrew-installable. The one that pays off fastest for most developers is the open-source Mac clipboard manager at the top of the list: once you stop losing copied API keys and code snippets mid-task, it is hard to imagine working without clipboard history. Download Maccy and run the Homebrew line; it takes under sixty seconds to set up and the difference is immediate.
The rest of the list can be installed in a single Homebrew cask line and the total disk footprint is under 300 MB for all ten apps combined.
