Packagist is the main Composer repository. It aggregates public PHP packages installable with Composer.
Easily render email subject, body, etc. from a single template or even a database entry.
cPanel PublicAPI PHP client and cPanel PHP library
Transip API client that can work with Heroku
eResults API Client for PHP
Symfony Bundle to use queue with workers
A Symfony2 Bundle for interfacing with Amazon Web Services (AWS)
Abandoned! See aws/aws-sdk-php-symfony
Simple PHP client to talk to the Bulletin API
WoD API client for PHP, developed by eResults
Abandoned! See guzzle/guzzle