EiffelStudio is an IDE for the Eiffel language (ECMA-367, ISO/IEC 25436). It has: an Eiffel compiler, an Eiffel GUI editor, a refactoring tool, Eiffel analysis tools and Eiffel libraries. Eiffel applies O-O principles and Design by Contract for quality. http://www.eiffel.com
The Eiffel Developers Project (EDP) is an IDE (Integrated Development Environment) for browsing, editing, validating and (eventually) compiling and executing programs written in Eiffel on Linux and Windows on Intel/AMD.
An Eiffel based OODBMS and associated access clusters.
Secom is an object-oriented library of portable, reusable components for communicating over serial devices. With secom you can develop an application that will compile and execute on Posix and Windows, with little to no changes to the source code.
EWG (Eiffel Wrapper Generator) is a tool that generates Eiffel wrapper classes for C libraries. It can be used to create libraries that bridge the gap between Eiffel and C. It aims to work for arbitrary ANSI C and with all common Eiffel compilers.
Multimedia Library for Eiffel
The canvas widget is a EiffelVision2 widget that supports zooming, panning, and animation of the displayed graphical objects.