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Open Screen Sharing is a macOS, iOS, and iPadOS screen-sharing client and server project by nekohasekai, based on the private Apple VNC protocol used by macOS Screen Sharing. It provides clients optimized for local and public networks, including Tailscale peer-to-peer connections, and adds exclusive mouse control, a debug HUD, fixed language switching, and interactions adapted for touch devices. Its iOS and iPadOS server implementation is based on Apple's iOS developer debugging protocol and can be accessed by the native macOS Screen Sharing app or its own client; the project also documents file dragging and server features that require sideloading because of App Store restrictions. macOS packages, iOS App Store and sideloadable builds, and nightly releases are provided. The project is licensed under the GNU General Public License v3.

OpenDisplay is a free, open-source second-monitor system for extending a Mac desktop to an iPhone, iPad, or another Mac over USB or Wi-Fi. It provides a true extended display rather than only mirroring, with Retina/HiDPI output, portrait or landscape orientation, touch and two-finger scroll input, and support for multiple connected devices. The Mac sender creates a virtual display with macOS's CGVirtualDisplay API, captures it with ScreenCaptureKit, hardware-encodes the frames as real-time H.264 using VideoToolbox, and sends them over a TCP connection. The receiving iOS or iPadOS app decodes the stream with AVSampleBufferDisplayLayer and sends touch and scroll control messages back for CGEvent injection. USB connections use macOS's built-in usbmuxd; Wi-Fi discovery uses Bonjour. A separate OpenDisplay Receiver app can turn a spare Mac into the display instead. The project is self-hosted and does not require an account or server connection for display streaming. The Mac sender requires macOS 14 or newer, while the spare-Mac receiver supports macOS 12 or newer; the official mobile receiver targets iOS/iPadOS 16 or newer. It is distributed under GPL-3.0, and its reliance on the private CGVirtualDisplay API prevents App Store distribution and may create compatibility risks across macOS updates.

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.

Squim is a remotely hosted iOS app build and distribution service. It builds and bundles an iOS app so a creator can install it on a phone through a web link and test changes.

SimRun is a macOS tool that runs iOS Simulator builds directly in ordinary Mac windows without booting a simulated iPhone. It launches the unchanged app built for the iOS Simulator, maps Mac mouse, trackpad, keyboard, clipboard, and motion input to iPhone interactions, and provides a launcher for managing apps, profiles, data containers, keychain items, logs, and runtime or device choices. Its command-line tool can launch, list, quit, screenshot, inspect, and stream logs from apps, run them headlessly with separate profiles, feed microphone input, and experimentally drive interfaces through a JavaScript API. It can also convert some development or ad hoc device builds for Simulator execution. SimRun requires an Apple-silicon Mac, Xcode with an iOS Simulator runtime, and disabled System Integrity Protection; it is an experimental project and does not replace testing in the Simulator or on a physical device. It is distributed under the MIT License.