Proxmox Virtual Environment is an open-source server virtualization environment. It allows deployment and management of virtual machines and containers
It is a self-hosted monitoring tool like "Uptime Robot".
Unraid is software for storing and managing digital files on a mass-storage server. It is an embedded Network Attached Storage (NAS) server operating system.
OPNsense is open source, FreeBSD-based firewall and routing software developed by Deciso. It is a fork of pfSense, which in turn was forked from m0n0wall.
This project comes as a pre-built docker image that enables you to easily forward to your websites running at home or otherwise, including free SSL, without having to know too much about Nginx or Letsencrypt.
Splunk (the product) captures, indexes and correlates real-time data in a searchable repository from which it can generate graphs, reports, alerts, dashboards and visualizations.
Nextcloud is an open source, self-hosted file share and communication platform. Access and sync your files, contacts, calendars and communicate and collaborate across your devices.