UserTalkFrontier is another popular script development environment for the Macintosh, which comes with its own scripting language, UserTalk. It was developed by Dave Winer of UserLand Software. Frontier is used to develop scripts in UserTalk, or AppleScript, or any other scripting language conforming to Apple's Open Scripting Architecture (OSA). For the same reason, UserTalk scripts can be developed with AppleScript tools, and CGI scripts, and other web-related scripting applications, can be written in UserTalk, and/or developed in Frontier. For instance, CGI scripts for WebStar can be developed in UserTalk with Frontier.
This game is also based on this language.