A division of ISE (Interactive Software Engineering), the company formed by Eiffel's inventor, Bertrand Meyer. Free downloads of EiffelStudio and Eiffel ENViSioN. Many documentation about Eiffel: tutorials, articles, manuals.
A complete development system for Eiffel with Compiler, Workbench, Debugger, Libraries and additional Tools. It's available for WIndows and Linux. [Open source, GPL]