OpenDisplay

Decimen Optical Transfer is an open-source browser-based file-transfer tool by Evan Crawley that sends files between devices using only a screen and a camera, without a network connection, pairing, permissions beyond camera access, or a dedicated app. The sender displays an endless stream of animated QR codes; the receiver collects fountain-coded frames in any order and uses Luby transform decoding to reconstruct the payload, so dropped frames affect transfer time rather than correctness. Transfers preserve filenames and media types, accept pasted text, support files up to 64 MB, and verify completed payloads with SHA-256. The web app works offline after its first visit and can be installed on iOS and Android home screens. QR streams can also be exported as APNG or PNG sequences for playback from a file, page, or video. Transmissions are not encrypted: data is readable by any camera pointed at the sending screen. The project is licensed under AGPL-3.0-or-later as of v0.4.0; releases through v0.3.0 remain available under the MIT license.

Screendrop is a native, local-first macOS menu bar application for capturing, annotating, recording, editing, compressing, and sharing screenshots and screen recordings. It captures displays, windows, or selected areas; provides configurable hotkeys and after-capture workflows; and includes a floating preview stack, offline History, non-destructive annotation with redaction and mockup effects, and a recording studio with separate screen, camera, microphone, system-audio, cursor, click, and keystroke data. Recording projects support timeline edits, zooms, reconstructed cursors, camera layouts, captions, transcript-based cuts, social aspect ratios, and reusable style presets. On-device speech recognition provides transcription, karaoke-style captions, filler-word removal, silence trimming, and a notch-native teleprompter. Optional self-hosted sharing uses a Cloudflare Worker, R2, and D1: the Worker authenticates uploads, stores media and metadata, and returns share links for screenshot viewers or Loom-style recording pages with transcripts, comments, playback controls, and scrub previews. Captures, projects, annotation sidecars, and transcripts remain on the Mac unless explicitly uploaded, and there is no central Screendrop account or hosted server. The project is distributed as a DMG or Homebrew cask, requires macOS 26.4 or newer according to its README, and is dedicated to the public domain under CC0 1.0 Universal.

Mac Duo is a native Swift and Metal macOS app that makes desktop effects follow the position of a MacBook lid. It provides six transitions—Duo, Ghost, Roll, Shutter, Flex, and Iris—that animate the desktop around the hinge, including panel sliding, display curling, bowing, or iris-like closure. The app includes live preview, floating controls, menu-bar access, pause controls, and an option to clear the screen after the lid remains still. It runs locally without third-party runtime dependencies, accounts, analytics, or screen-content uploads; screen frames remain in memory when Screen Recording permission is enabled. It supports macOS 13 Ventura or newer on compatible Apple-silicon MacBooks, with an Intel preview for the 2019 16-inch MacBook Pro, and is distributed under the MIT license.

Crisp is a free, open-source native menu bar app for controlling external monitors on macOS. It adds sharp HiDPI scaled resolutions, fine-grained display scaling, hardware brightness and volume control over DDC, software dimming for unsupported monitors, display presets, display arrangement, color and system toggles, and virtual displays. Presets can store named resolution, brightness, and arrangement configurations, while the app can disconnect and reconnect physical displays. Crisp is distributed for free without a Pro tier or license key. It can be installed through Homebrew or a downloadable DMG; the repository says releases are signed and notarized by Apple. The app is localized in English and Simplified Chinese.

Capptivo is a free, open-source screen recorder and editor for creating demo videos on macOS, Windows, and Linux. It tracks cursor movement and clicks to apply follow-cursor and click-based automatic zooms, and provides editor presets, annotations, facecam, backgrounds, captions, and MP4, WebM, or GIF export. Captions use a system whisper.cpp command-line binary, with model weights downloaded on first use. The application captures macOS screens through ScreenCaptureKit with VideoToolbox H.264 encoding, Windows screens through Windows.Graphics.Capture with hardware-encoding support, and Linux screens through xdg-desktop-portal and PipeWire. It is distributed through platform installers, including DMG or app archives for macOS, MSI or setup executables for Windows, and DEB, AppImage, or RPM packages for Linux. The repository releases it under the MIT license.