The AK (Awesome Kernel) library provides foundational C++ utilities used across the entire OS: custom types (ErrorOr, Span, String, FlyString), algorithms, synchronization primitives, and memory management. It is self-contained, well-tested, and could be extracted as a standalone utility library for any C++ project.

A reusable color picker dialog with RGB/alpha spinboxes, HTML text input, preview widget, and palette/custom tabs. It uses the C_OBJECT macro and an on_color_changed callback, demonstrating a clean composition pattern for GUI dialogs in LibGUI. The component is self-contained and could serve as a model for building similar picker dialogs.

A concise test file for JavaScript's logical AND operator, covering boolean, string, number, object, null, and undefined cases. It uses a simple test() pattern with expect().toBe() assertions. This testing approach is reusable for validating any JavaScript operator semantics and is independent of the larger OS context.

RequestServer is a system service that handles HTTP/HTTPS requests using the IPC::MultiServer pattern. It demonstrates a clean separation of network protocol handling from the client application, with pledge/unveil for sandboxing and Core::EventLoop for async I/O. The service architecture is reusable for any network-facing userland service in a Unix-like OS.