1.PHPMailer / PHPMailerThe classic email sending library for PHPphpsmtpphp-libraryemailxoauth2tls-support+3 morePHPLGPL-2.122K total9.8K forks+370 starsfrom 21,973 · score 5.92
2.cypht-org / cyphtCypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)phpwebmailwebmail-clientimappop3smtp+6 morePHPLGPL-2.11.8K total256 forks+311 starsfrom 1,476 · score 5.74
3.dompdf / dompdfHTML to PDF converter for PHPdompdfphpfonthtmlcsshtml-to-pdf+1 morePHPLGPL-2.111K total1.8K forks+135 starsfrom 11,076 · score 4.91
4.ezyang / htmlpurifierStandards compliant HTML filter written in PHPPHPLGPL-2.13.3K total363 forks+31 starsfrom 3,317 · score 3.47
5.php-amqplib / php-amqplibThe most widely used PHP client for RabbitMQphpamqprabbitmqmessagingphp-amqplibhacktoberfestPHPLGPL-2.14.6K total1K forks+20 starsfrom 4,579 · score 3.04