Provides a way to profile code
Allows manipulating MIME messages
Provides functions to read and write from/to an object or array
Component of phpDocumentor that provides a DocBlock parser
Annotations docblock parser
Provides tools to manage errors and ease debugging PHP code
Provides an improved replacement for the array_replace PHP function
Converts words between their singular and plural forms (English only)
Translation abstractions extracted out of the Symfony components
Provides tools to validate values
Provides an engine that can compile and evaluate expressions
Eases DOM navigation for HTML and XML documents
Integration of the Security component into the Symfony framework
Handles serializing and deserializing data structures
Provides integration for Monolog with various Symfony components
Goutte, a simple PHP Web Scraper
Doctrine Cache component
Small PHP MVC Framework