ApiGen : ApiGen is the tool for creating professional API documentation from PHP source code, similar to discontinued phpDocumentor/phpDoc.
TLA : TLA stands for the Temporal Logic of Actions, but it has become a shorthand for referring to the TLA+ specification language and the PlusCal algorithm...
churn-php : churn-php is a package that helps you identify php files in your project that could be good candidates for refactoring.
Psalm : Psalm is a static analysis tool for finding errors in PHP applications.
PHP_CodeSniffer : PHP_CodeSniffer tokenises PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.
Pre is a PHP preprocessor, designed to make adding new syntax effortless. It's also a collection of pre-built macros, which we use because they make our code clearer and simpler.