liriliri/aya

Joplin is an open-source, privacy-focused note-taking application built with TypeScript that prioritizes offline access and user data ownership. It stores notes in Markdown format and supports end-to-end encrypted synchronization with Nextcloud, Dropbox, OneDrive, or Joplin Cloud, meaning your data stays under your control without vendor lock-in. The application handles large note collections organized into notebooks with full-text search across all platforms (Windows, macOS, Linux, Android, iOS), and includes a Web Clipper for Firefox and Chrome to capture web content directly. What sets Joplin apart is its extensibility through plugins and themes, plus the ability to import directly from Evernote including formatted content and metadata — a genuine migration path for users leaving proprietary ecosystems. The offline-first architecture ensures notes remain accessible without internet connectivity, which matters for users in regions with unreliable connections or those who simply prefer not to depend on cloud availability.

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.

scrcpy is an open-source application from Genymobile that mirrors an Android device's video and audio onto a Linux, Windows, or macOS desktop over USB or TCP/IP, and lets you control the device using the computer's keyboard and mouse. It runs without root access and without installing any companion app on the phone, per the README, and the project is available under an Apache-2.0 license.

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.