Directory

Apple's built-in notes app for Mac, iPhone, iPad and iCloud.com with folders, tags, attachments, handwriting, shared notes and on-device search

Apple's on-device machine-learning runtime for iOS and macOS apps, with the open-source coremltools package for converting PyTorch and other models to its format

Apple's app and Swift framework for training image, text, sound, tabular and activity models on a Mac without writing training code, exporting directly to Core ML

Apple's Swift framework giving apps access to the on-device Apple Intelligence language model with guided generation, tool calling and sessions, on OS 26 and later

Open-source, outliner-based knowledge base storing notes as local Markdown or Org-mode files with block references, queries and a graph view

Open-source vector-tile map renderers for web (GL JS) and native platforms, forked from Mapbox GL and governed by a community organisation

Apple's low-level GPU programming framework for graphics and parallel compute on iOS, macOS and visionOS, the layer beneath MLX, Core ML and most Apple Silicon ML runtimes

Local-first Markdown note-taking app with bidirectional links, graph view and a large community plugin ecosystem; optional paid Sync and Publish

Component-based JavaScript library for building user interfaces, created at Meta, with hooks, a declarative rendering model and server components

Apple's built-in visual automation app for macOS, iOS and iPadOS that chains app actions, scripts and system functions into runnable shortcuts

Public-domain embedded SQL database engine that stores a whole database in one file and ships inside most operating systems and browsers

Apple's compiled, memory-safe, multi-paradigm language for Apple platforms, Linux, Windows and embedded targets, developed in the open at swift.org

Apple's declarative UI framework for building interfaces in Swift that run across iOS, iPadOS, macOS, watchOS, tvOS and visionOS

Minimal, high-speed VPN protocol and implementation built on modern cryptography, included in the Linux kernel and available on macOS, iOS, Windows, Android and BSD

Free, open-source reference manager with browser connectors, word-processor plugins, a PDF reader, group libraries and optional paid file storage