Some Useful PHP Libraries

PHP already comes with a wide range of libraries, including database access, zip files and emailing. Sometimes though, you need something beyond these or would like more functionality, more power or more … something else. The libraries presented here could be very useful in certain areas.

Swift Mailer
A general library for emailing that goes far beyond the capabilities of the built-in libraries.
A library for creating PDFs. Good for creating things like dynamic product catalogues or invoices.
A graphing library, designed to create sparklines, which can be extremely useful if used properly.

Also, although it's not really a library, the Zend Framework contains a lot of functionality and may have something useful to you.