Packages 
Package Description
ratpack.bytebuf  
ratpack.config
Provides the ability to access configuration data from a variety of sources, such as YAML, JSON, properties files, system properties, and environment variables.
ratpack.error
Types that deal with handling application errors.
ratpack.file
Types for dealing with the file system and serving files.
ratpack.form
Support for handling uploaded forms, including file uploads.
ratpack.handling
The handling of application requests.
ratpack.handling.direct
Low level direct access to the underlying Netty internals.
ratpack.health
Health checks report on the status of key components in the system and are generally used for monitoring and reporting.
ratpack.http
The HTTP protocol.
ratpack.http.client
The HTTP client.
ratpack.impose  
ratpack.jackson
Integration with the Jackson JSON marshalling library.
ratpack.logging
Utility classes for integration Ratpack with various logging frameworks.
ratpack.parse
Parsing in Ratpack refers to deserializing a request body into a Java object of some type.
ratpack.path
Types for managing the paths of requests inside the application.
ratpack.render
The renderer framework provides a pluggable mechanism for serializing objects to the response.
ratpack.server
Objects used to start a ratpack application.
ratpack.service
Services participate in the application start/stop lifecycle.
ratpack.sse
Support for Server Sent Events.
ratpack.ssl
Convenience utitilities for dealing with SSL.
ratpack.websocket
Support for Websockets.