Editing Eiffel (programming language) (section)

===Implementations and environments===
[[EiffelStudio]] is an [[integrated development environment]] available under either an [[Open-source license|open source]] or a commercial license. It offers an object-oriented environment for [[software engineering]]. EiffelEnvision is a plug-in for [[Microsoft Visual Studio]] that allows users to edit, compile, and debug Eiffel projects from within the Microsoft Visual Studio IDE. Five other [[Open-source software|open source]] implementations are available: "The Eiffel Compiler" tecomp; Gobo Eiffel; [[SmartEiffel]], the GNU implementation, based on an older version of the language; [[LibertyEiffel]], based on the SmartEiffel compiler; and [[Visual Eiffel]].

Several other programming languages incorporate elements first introduced in Eiffel. [[Sather]], for example, was originally based on Eiffel but has since diverged, and now includes several [[functional programming]] features. The interactive-teaching language Blue, forerunner of [[BlueJ]], is also Eiffel-based. The [[Apple Media Tool]] includes an Eiffel-based Apple Media Language.