Emby (formerly Media Browser) is a media server designed to organize, play, and stream audio and video to a variety of devices.
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.
Proxmox Virtual Environment is an open-source server virtualization environment. It allows deployment and management of virtual machines and containers
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.
Portainer is a simple management solution for Docker. Easily manage your Docker hosts and Docker Swarm clusters via Portainer web user interface.
Apache Guacamole is a clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH.
A very simple and fully functional Raspberry Pi-based KVM over IP that you can make with your own hands without any soldering!
Authentik is an open-source Identity Provider focused on flexibility and versatility. You can use Authentik in an existing environment to add support for new protocols, implement sign-up/recovery/etc. in your application so you don't have to deal with it, and many other things.