mapbox/mapbox-gl-native

Flutter is Google's open-source SDK, hosted at flutter/flutter on GitHub, for building user interfaces across mobile, web, and desktop from a single Dart codebase. The repo is licensed BSD-3-Clause, and its README documents stateful hot reload, a Skia/Impeller rendering pipeline, and Material/Cupertino widget sets as the core pieces developers work with.

Free Programming Books (Chinese) is justjavac's GitHub index of free programming books, translated manuals, and course notes in Chinese, organized under headings like AI, Go, C/C++, and version control. It's a link list, not a curriculum - entries range from full book translations to single blog posts, some flagged `:worried:` for dead links, and contribution happens only through pull requests.

A collaborative GitHub list linking to open-source apps across iOS, iPadOS, watchOS, tvOS, and visionOS, grouped into categories like Browser, Communication, and Clone, with each entry tagged by year and language.

BitChat is a mesh chat app for iOS and macOS that routes messages over Bluetooth LE when you're offline and falls back to the Nostr protocol when you have signal, with no phone number, account, or central server involved. It's built for people who want to text nearby without cell service — a protest, a festival, a dead zone — and its own whitepaper is upfront about where the privacy model still has gaps, like a persistent per-device identifier and store-and-forward messages that skip forward secrecy.