Completely free and open-source, cross-platform markdown-based notes application with real-time preview and advanced features Built cross-platform markdown-based notes application with real-time preview Implemented hierarchical folder organization, auto-save, and full-text search Designed custom markdown renderer with interactive checkboxes and dark/light theming Added share-intent integration and offline-first local persistence Used optimized React Context state management for performance Implemented custom syntax highlighting for code blocks Implemented custom whiteboard with export and import fucntionality