Nebular is a comprehensive Angular UI component library developed by Akveo. It provides over 40 reusable components (buttons, cards, tables, calendars, dialogs, etc.), a powerful theming engine with four built-in themes (default, dark, cosmic, corporate), and optional modules for authentication (password, OAuth2, Firebase) and role-based security. The repository is structured as a monorepo with multiple npm packages (@nebular/theme, @nebular/auth, @nebular/security, etc.), each with its own build configuration and tests. The library follows consistent patterns: all components use Angular's NgModule system, implement ControlValueAccessor for form integration, and leverage a custom overlay system built on Angular CDK for popups, tooltips, and modals. The codebase is well-organized with extensive unit tests and e2e tests, but shows signs of maintenance drift: the README explicitly states minimal active development (only Angular version bumps), many components still use deprecated Angular patterns (standalone: false, static ViewChild), and e2e tests rely on Protractor (deprecated). Despite this, the library remains functional and widely used, with a large set of documented examples and a dedicated documentation site.