Implements a privacy-friendly Altcha captcha using proof-of-work. Features a custom reactive system (signals/effects) for efficient UI updates and offloads intensive computations to web workers to prevent UI blocking. Encapsulated as a custom element for easy integration into Odoo's website builder. Demonstrates non-obvious frontend performance optimization and encapsulation patterns.

Provides a reusable QWeb template for a country dropdown that can be inserted into any Odoo form view. Includes XML structure and styling, requiring no modification for reuse. Demonstrates a clean, self-contained frontend component pattern that solves a common form enhancement need.

Integrates the Select2 library into Odoo as a widget for enhanced form selects. Wraps third-party CSS/JS in an Odoo-compatible widget with proper asset bundling. Shows a standardized pattern for incorporating external JavaScript libraries into Odoo while maintaining upgrade safety.

Adds blog post scheduling functionality by extending the blog.post model with a scheduled publication date. Includes a transient model wizard for setting dates and a cron job for automatic publishing. Demonstrates a well-contained feature following Odoo's patterns for wizards, model extensions, and automated actions.

Implements URL-based access control by overriding Odoo's ir.http model to check authentication. Provides a res.config.settings model to configure restricted URLs. Shows an isolated, reusable pattern for adding authentication requirements to specific website pages without modifying core code.