1.PHPMailer / PHPMailerThe classic email sending library for PHPphpsmtpphp-libraryemailxoauth2tls-support+3 morePHPLGPL-2.122K total9.8K forks+146 starsfrom 22,197 · score 4.99
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+133 starsfrom 1,654 · score 4.90
3.dompdf / dompdfHTML to PDF converter for PHPdompdfphpfonthtmlcsshtml-to-pdf+1 morePHPLGPL-2.111K total1.8K forks+63 starsfrom 11,148 · score 4.16
4.ezyang / htmlpurifierStandards compliant HTML filter written in PHPPHPLGPL-2.13.3K total363 forks+14 starsfrom 3,334 · score 2.71
5.php-amqplib / php-amqplibThe most widely used PHP client for RabbitMQphpamqprabbitmqmessagingphp-amqplibhacktoberfestPHPLGPL-2.14.6K total1K forks+6 starsfrom 4,593 · score 1.95