I've been sustaining myself for a couple of years now on my open source project (BookStack). Still going in a positive direction.
Other than that, some that come to mind: Proxmox, Opnsense, SnipeIT, GitLab, Canonical, Codeweavers/wine, Plausible, Home-assistant/open-home-foundation/NabuCasa, FreeBSD Foundation, Laravel, Blender, Godot.
Within there is a whole mix of business plans, some offer hardware, some are open core, some offer related paid services, some offer hosting, some offer support etc...
Other than that, some that come to mind: Proxmox, Opnsense, SnipeIT, GitLab, Canonical, Codeweavers/wine, Plausible, Home-assistant/open-home-foundation/NabuCasa, FreeBSD Foundation, Laravel, Blender, Godot.
Within there is a whole mix of business plans, some offer hardware, some are open core, some offer related paid services, some offer hosting, some offer support etc...