Swift Programming Language

Kotlin is a concise, multiplatform programming language developed by JetBrains. It is used to build backend, mobile, web, and desktop applications, including native Android applications, and supports object-oriented and functional programming, asynchronous code, and null safety. Kotlin Multiplatform lets developers share code across platforms such as Android, iOS, macOS, Windows, Linux, and watchOS while retaining platform-specific code where needed. Kotlin is included with current versions of IntelliJ IDEA and Android Studio.

Starboard is a macOS terminal that permanently docks beside the system Dock rather than appearing as a hotkey-triggered overlay. It tracks the Dock's position and height, remains visible across Spaces and full-screen apps without taking focus, and runs a persistent login shell using zsh -l so the working directory, history, and shell state carry between commands. The terminal provides a dark nautical ANSI palette plus 20 built-in themes, Cmd+E to expand or restore its height, and Cmd+T to open a keyboard-controlled theme picker. The project is implemented in under 700 lines across four Swift files with no dependencies, according to the video description. It can be installed through the project's Homebrew tap or from a release archive, and it can be built with Swift. Release builds are ad-hoc signed and not notarized, so the first launch requires Gatekeeper approval and Accessibility permission for Dock tracking; login startup can be configured through macOS Login Items or the provided installation script.

macOS is a proprietary, Unix-based desktop operating system developed by Apple Inc. for Mac computers. It is built on the Darwin (XNU) kernel and provides the Aqua graphical environment with native application frameworks such as AppKit, Cocoa, and SwiftUI, a POSIX-compliant user space, and services including iCloud, Handoff, and the Mac App Store for app distribution. macOS runs on Intel x86_64 and Apple silicon (ARM64) architectures with support for Universal binaries, includes security features like Gatekeeper and System Integrity Protection, and is licensed and distributed by Apple as part of Mac hardware and system updates.

Swiftlet is an open-source Swift and Metal runtime for running Qwen3-Next and Qwen3.5/3.6 mixture-of-experts models locally on Apple devices, including iPhones. It keeps the models' small dense core in memory and streams routed expert weights from storage on demand, allowing 35B and 80B models to run with comparatively low RAM. The project is available as a Swift package, command-line interface, OpenAI-compatible server, and iOS app; its repository describes the runtime as working end to end and notes that only about 3B parameters are active per token in the supported models.

BrewUI is Homebrew's official macOS graphical interface for discovering, installing, updating, and managing Homebrew packages without requiring Terminal use. It uses a native SwiftUI interface while exposing the underlying Homebrew operations, with data from the brew CLI and Homebrew JSON API. The application is built with Swift 6.0, Swift Package Manager, and strict concurrency, supports macOS Tahoe 26 and later, and is distributed under the AGPL-3.0 license.