.YML File Extension Information

What program uses .YML file extension?

Program : Ruby on Rails Database Configuration File
Program Website: Ruby on Rails Database Configuration File
Company : Ruby on Rails Project
Company Website: Ruby on Rails Project

Extensions starting with

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | #-0-9