The following modules have userguide pages:
Kohana - Documentation for Kohana core/system.
Auth - User authentication and authorization.
Cache - Common interface for caching engines.
Codebench - Code benchmarking tool.
Database - Database agnostic querying and result management.
Image - Image manipulation.
Minion - Minion is a simple command line task runner
ORM - Official ORM module, a modeling library for object relational mapping.
Unittest - Unit testing module
Userguide - Documentation viewer and api generation.