Action used by Automator, a program for creating automations in Mac OS X; contains a specific action that can be combined with other actions to create an automated process; these processes are saved as .WORKFLOW documents.
ACTION files are typically located in the /System/Library/Automator folder.
Program(s) that open action files
Mac: Apple Automator
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/action
