Mojolicious is a full-stack web framework and HTTP client for Perl that provides an object-oriented API without hidden magic or dependencies. It includes features like asynchronous I/O, routing, plugins, sessions, templating, internationalization support, and JSON/XML handling. Mojolicious comes in three flavors: Mojolicious::Lite for simple apps, Mojolicious for full MVC apps, and Mojo as a lightweight base framework. It supports technologies like CGI, FastCGI, PSGI, HTTP 1.1, and WebSockets.