Packagist is the main Composer repository. It aggregates public PHP packages installable with Composer.
A PHP utility library
No-fuss configuration loader, processor and cache
Work with temporary files and folders easily across OSes.
An active record implementation on top of the Doctrine DBAL.
An easy to use firewall and security library for PHP and the Symfony HttpKernel.
A PHP 5.4+ framework built on the Symfony HttpKernel.
Create forms that render and validate with ease.