The terraform plugin for jetbrains products works really well. It auto completes all the resource types and knows what keys are valid under each one, so will suggest keys and highlight a resource as invalid if it’s missing a required key. I can’t imagine coding terraform plans without it.

If you're doing Puppet then the plugin for IntelliJ works pretty well with Puppet code, including reference checks and all the good stuff you'd expect from a half-decent IDE.

Can't say anything about Chef or Salt, but with Ansible you get basically shit for help since the IDE just sees a YAML file and nothing more. This is partially the fault of Ansible though, to be honest, modules being standalone scripts that is cool - but they provide no standardized way to inspect their parameters and outputs beyond documentation.