openDCIM is a free, web-based application for managing data center infrastructure, replacing spreadsheets and offering features such as inventory tracking, capacity planning, and power outage simulation.

OpenEMR

OpenEMR is the world's leading Open Source electronic health record (EHR) and medical practice management software, providing a comprehensive, cost-effective, and customizable solution for healthcare providers.

OpenJDK is an Open Source project that provides a free and collaborative implementation of the Java Development Kit.

OpenKM

OpenKM is a Open Source Document Management System

OpenLdap

OpenLDAP is a robust, Open Source implementation of the Lightweight Directory Access Protocol (LDAP), providing a suite of tools and libraries for managing directory information.

OpenNebula

OpenNebula is an Open Source cloud and edge computing platform that simplifies the management of private, hybrid, and edge cloud infrastructures.

OpenNebula Community Edition

OpenNebula is an Open Source cloud and edge computing platform that simplifies the deployment and management of private, hybrid, and multi-cloud infrastructures.

OpenProject

OpenProject is a powerful, secure, and Open Source project management software for classic, agile, or hybrid project management.

OpenSearch

OpenSearch is an Open Source, enterprise-grade search and observability suite for managing unstructured data at scale.

OpenStack

OpenStack is an Open Source cloud computing platform providing a comprehensive suite of services for building and managing cloud infrastructure.

openSUSE

openSUSE is a community-driven Open Source Linux distribution offering stable and rolling release options, along with a comprehensive suite of development tools.

OpenTestFactory

OpenTestFactory is an Open Source test orchestration framework for automating and managing automated tests.

OpenVAS

OpenVAS is a powerful and versatile Open Source vulnerability scanner providing comprehensive security assessments for various systems and protocols.

OpenVZ

OpenVZ is an Open Source container-based virtualization technology for Linux that allows multiple isolated virtual environments to run on a single physical server.

Open Web Calendar is a customizable, Open Source web calendar that embeds into websites using ICS links, ensuring privacy and broad compatibility.

Open-Xchange

Open-Xchange provides open, flexible, and scalable email platform solutions for businesses and service providers worldwide.

OpnForm

OpnForm is an Open Source, no-code platform for creating beautiful and functional online forms.

OPNsense

OPNsense is a free and Open Source firewall and router offering robust network security and easy management.

OrangeHRM is a comprehensive, Open Source Human Resource Management system.

OS.js is an Open Source JavaScript web desktop platform providing a full desktop environment within a web browser.

osTicket

osTicket is a free, Open Source help desk and support ticket system.

Osuny

Osuny is an Open Source content management system focused on creating accessible, sustainable, and secure websites.

Outline

Outline is a fast, collaborative knowledge base platform for teams to organize, share, and access information efficiently.

OWASP ZAP

OWASP ZAP is a free and Open Source web application security scanner that helps identify and mitigate vulnerabilities.