EiffelStudio is a complete development environment for the Eiffel programming language. It includes a compiler, an interactive debugger, and many modern features like a full round-trip class diagram editor or refactoring support. Eiffel is compiled through C to produce very fast executables, or it can be compiled directly to .NET.

EiffelStudio is highly portable and supports Linux, Microsoft Windows, Mac OS X, most flavors of Unix, and even VMS or embedded environments. Portability of applications is supported by a large set of portable libraries, including: EiffelBase (data structure), EiffelNet (network), EiffelVision (native GUI), EiffelStore (database access), EiffelParse (parsing), Gobo (XML), EiffelWeb (Web), EiffelCOM (COM), and many more.