I don’t know of any fork that’s specifically made of Nomad but maybe because it has a ton of open source competition, there’s Kubernetes, K3s, Proxmox, Docker Swarm, Mesos and a bunch of others.
etcd might cover Consul. I’m not familiar with that side of ops. Do some searches on reddit. The thing is, you typically want several such products that work well together if you want a full solution. It depends on your needs. Each product individually has alternatives but when you put them together they can fit well or not.