Open Source PHP Communications Software for Windows

Moodle is a Course Management System (CMS), also known as a Learning Management System (LMS) or a Virtual Learning Environment (VLE). It is a Free web application that educators can use to create effective online learning sites. https://moodle.org/

PHPMailer – A full-featured email creation and transfer class for PHP. Support for UTF-8 content and 8bit, base64, binary, and quoted-printable encodings. SMTP authentication with LOGIN, PLAIN, CRAM-MD5, and XOAUTH2 mechanisms over SMTPS and SMTP+STARTTLS transports. Validates email addresses automatically. Many PHP developers need to send email from their code. The only PHP function that supports this directly is mail(). However, it does not provide any assistance for making use of popular features such as encryption, authentication, HTML messages, and attachments. Formatting email correctly is surprisingly difficult. There are myriad overlapping (and conflicting) standards, requiring tight adherence to horribly complicated formatting and encoding rules – the vast majority of code that you'll find online that uses the mail() function directly is just plain wrong, if not unsafe!

SquirrelMail is a PHP-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It has strong MIME support and a flexible plugin system.

SeedDMS is an easy to use but powerful Open Source Document Management System based on PHP and MySQL or sqlite3. Many years of development has made it a mature and enterprise ready plattform for sharing and storing documents.

phpList delivers Open Source email marketing, including analytics, list segmentation, content personalisaton and bounce processing. Extensive technical features and a secure and stable codebase are the result of over 17 years of continuous development. Used in 95 countries, available in 20+ languages, and used to send 25 billion email campaigns last year. Deploy it with your own SMTP server, or get a free hosted account at http://phplist.com.

MRBS is a system for multi-site booking of meeting rooms. Rooms are grouped by building/area and shown in a side-by-side view. Although the goal was initially to book rooms, MRBS can also be used to book any resource; computers, planes, whatever you want

Elastix is a software-based PBX powered by 3CX and based on Debian. An open-standards solution, Elastix is an easy to install and manage UC system compatible with popular IP phones, gateways and SIP trunks. Elastix is complete with unified communications features such as integrated WebRTC video conferencing, chat, presence and softphones and smartphone clients for Windows, Mac, iOS and Android.

Easy SMS is a PHP package for sending SMS messages through multiple service providers using one consistent interface. It helps developers avoid writing separate integrations for every SMS gateway their application may need. The package uses configurable gateways, strategies, messages, and phone number handling to make SMS delivery easier to manage. It is especially useful in applications that need verification codes, alerts, notifications, transactional messages, or fallback delivery across providers. The project is installed through Composer and is part of Overtrue’s broader PHP ecosystem. It is aimed at developers who want a practical abstraction layer for multi-channel SMS delivery in PHP applications.

ownCloud Core is the foundational server component of the ownCloud ecosystem, providing a self-hosted platform for secure file storage, synchronization, and sharing across devices and teams. It enables organizations and individuals to maintain full control over their data by running a personal cloud on their own infrastructure rather than relying on third-party providers. The software supports collaborative workflows by allowing users to upload, organize, and share files through a web interface, desktop sync clients, and mobile integrations. Designed with extensibility in mind, the core platform can be enhanced through apps and plugins that add capabilities such as document editing, authentication methods, and workflow automation. It is widely used in enterprise and privacy-focused environments because it combines open-source transparency with enterprise-grade controls and permissions.

A PHP email creation and transport class featuring file attachments, SMTP servers, CCs, BCCs, HTML messages, word wrap, and more. Sends email via sendmail, PHP mail(), QMail, or with SMTP. PHPMailer is used by many popular PHP development frameworks and is one of the most popular email-generating and sending libraries in the world. This project is defunct here on sourceforge – it's now maintained on Github at https://github.com/PHPMailer/PHPMailer. Documentation is available at https://github.com/PHPMailer/PHPMailer/wiki

phpseclib is designed to be ultra-portable. The 3.0 version works on PHP 5.6+ and doesn't require any extensions. For purposes of speed, OpenSSL, GMP, libsodium or mcrypt are used, if they're available, but they are not required. phpseclib is designed to be fully interoperable with standardized cryptography libraries and protocols. MIT-licensed pure-PHP implementations of SSH-2, SFTP, X.509, an arbitrary-precision integer arithmetic library, Ed25519 / Ed449 / Curve25519 / Curve449, ECDSA / ECDH (with support for 66 curves), RSA (PKCS#1 v2.2 compliant), DSA / DH, DES / 3DES / RC4 / Rijndael / AES / Blowfish / Twofish / Salsa20 / ChaCha20, GCM / Poly1305. The only requirement that phpseclib 3.0 has is that you must be using PHP 5.6+. Using phpseclib2_compat will actually bring a few enhancements to your dependency.

Free, open source Computer Aided Dispatch for volunteer fire departments, ARES/RACES, CERT teams, EMS, search & rescue, and campus security. 30+ years of real-world use. Zero cost. Self-hosted.

phpBB is the world's leading Open Source flat style discussion forum software. It includes all the features you expect to find in today's top of the line software.