YAML - YAML 1.2 --- YAML: YAML Ain't Markup Language
ini - The list maker.
TOML - TOML - Tom's Obvious, Minimal Language
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
JSON - (JavaScript Object Notation) is a lightweight data-interchange format
FAI - FAI is a non-interactive system to install, customize and manage Linux systems