SaltStack for configuration management, absolutely. We use it to manage our Linux servers, Macs, and the few Windows desktops that linger around the office. We also use it to bootstrap Kubernetes, audit configuration of some clusters, and provision dev machines.

Salt can also run agentless, and is much, much faster than Ansible, and has excellent support for both Docker and Kubernetes, which is a huge plus for us. Everything that can't be put in a Dockerfile gets run through Salt