BEST OPEN SOURCE SOFTWARE TOOLS

Complete e-mail solution with IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, Internationalization (IDNA), automatic TLS with ACME and Let's Encrypt, account autoconfiguration, and webmail

Distributed, secure messenger with audio and video chat capabilities

Notification server with Android and CLI clients (alternative to PushBullet)

A simple, fast, and reliable chat server powered by Matrix

Podcast management hosting platform that includes the latest podcast 2.0 standards, an automated Fediverse feed, analytics, an embeddable player, and more

Create polls to vote on dates and times (alternative to Doodle)

Web interface for running Linux shell commands

Omni-channel customer engagement and messaging automation platform (alternative to Braze, Customer.io, Iterable)

Open-source web analytics with privacy-first tracking

Drupal module for browsing and managing Fedora-based digital repositories

Build and manage a comic book library. Download, rename, move and convert issues of the volume to your liking

Speedy and secure content management system built on the Laravel PHP framework

The straightforward, capable, and well-documented CMS.

Streamline your food co-op's orders, inventory, and member management

Privacy-friendly and customizable Disqus (comment system) alternate

Share sensitive information securely with self-destructing links that are only viewable once

Save the precious readable content of web pages you like and want to keep forever. See it as a bookmark manager and a read later tool

Serendipity (s9y) is a highly extensible and customizable PHP blog engine using Smarty templating

Personal assistant who can live on your server

Powerful Cron alternative with a Web UI. It allows you to define dependencies between commands as a Directed Acyclic Graph (DAG) in a declarative YAML format

Realistic IoT data generator for MQTT, HTTP and TCP.

The Pimcore e-commerce plugin for unified commerce.

Comment system built in Golang, providing a lightweight and highly customizable solution for adding comments to your website

SMTP (email) server with a focus on simplicity, security, and ease of operation