Owncast is a free and open source live video and web chat server for use with existing popular broadcasting software.

OpenWrt is a Linux distribution for routers and embedded devices, with a full package manager and writable filesystem. Running it as a VM turns the host into a router.

OpenObserve is a simple yet sophisticated log search, infrastructure monitoring, and APM solution.

openHAB is a popular open-source home automation platform that provides a vendor and technology agnostic solution for integrating and automating various smart home devices and services. It supports a wide range of devices and protocols, making it easy to bring together different systems and devices into a unified smart home ecosystem. With its user-friendly interface and powerful automation capabilities, openHAB makes it easy to create custom automations and monitor and control your smart home devices and systems, all from a single interface.

OpenMediaVault is a next-generation network-attached storage (NAS) solution based on Debian Linux. It provides a web-based interface for managing and storing digital data, making it easy to use and set up. OpenMediaVault supports various storage protocols, including SMB/CIFS, NFS, and FTP, and provides a wide range of features for data management, such as user and group management, disk quotas, and data backup and recovery. The software is designed to be flexible and scalable, making it a valuable solution for both personal and enterprise use. OpenMediaVault provides a stable and reliable platform for managing and storing digital data, making it a popular choice for those who want to host their own data and ensure its security and privacy. With OpenMediaVault, users can access their data from anywhere and easily share it with others, making it a valuable tool for collaboration and data management.

Ombi is a self-hosted web application designed to empower shared Plex, Emby or Jellyfin users with automated content request capabilities. By integrating with various TV Show and Movie DVR tools, Ombi ensures a smooth and comprehensive experience for your users, allowing them to effortlessly request content on their own.

Omada Controller is a software application used to manage TP-Link's Omada EAP (Enterprise Access Point) devices. It allows administrators to centrally manage a large number of EAPs, monitor network performance, and control user access to the network. The software provides an intuitive interface for network configuration, firmware upgrades, and network monitoring. By using the Omada Controller, administrators can streamline the management process, reduce manual intervention, and improve the overall security and reliability of the network.

OliveTin provides a secure and straightforward way to execute pre-determined shell commands through a web-based interface.

OctoPrint is a free and open-source web-based 3D printer control software that allows you to remotely control and monitor your 3D printer from a web interface. It was designed to be compatible with a wide range of 3D printers.

ntfy (pronounced notify) is a simple HTTP-based pub-sub notification service. It allows you to send notifications to your phone or desktop via scripts from any computer, and/or using a REST API. It's infinitely flexible, and 100% free software.