IRCil

IRCil is an open-source IRC client designed to be highly extensible through plugins and a built-in scripting layer. It aims to provide a compact, configurable platform for participating in Internet Relay Chat networks while enabling automation and customization for power users.

Architecture and scripting: The core provides IRC protocol handling, connection management, and UI rendering, while a plugin API and an embedded scripting language enable third-party extensions. Scripting is event-driven, allowing users to react to messages, join channels, or implement filters, automations, and custom commands without modifying the core code.

Features: Multi-network connectivity, configurable user interface (text-based and graphical frontends), session persistence, message filtering and logging, and a library of community plugins. It supports server-side features like SASL authentication and TLS where available, along with basic scripting for automation.

Development and licensing: IRCil is maintained by an open-source community and licensed under a permissive license to encourage experimentation. The project emphasizes portability across Unix-like systems and Windows, with build and packaging tools that simplify installation.

Reception and usage: IRCil has a small but active user base in niche communities that value scriptability and low-resource operation. Critics point to limited documentation and a relatively steep learning curve for new users seeking to develop plugins or scripts.

See also: List of IRC clients, Comparison of Internet Relay Chat clients.