EDA is an Eiffel implementation of the General Decimal Arithmetic Specification. It allows unlimited precision decimal arithmetic. By implementing the GDA Specification version 1.08, the library conforms to the requirements of the ANSI/IEEE standard 854-1987, while supporting integer and unrounded floating-point arithmetic as a subset. EDA is part of the SAFE project.
OO Bench compares the speed of the same object-oriented tasks in several object-oriented languages. C++, Objective-C, and Java are currently supported. Support for Smalltalk, CLOS, CSharp, and Eiffel are in development. It aims to be simple, easy to understand, and easy to port. It also aims to follow the idioms and best practices advised by each language as much as possible. It is designed to make it easy to look up how a particular problem is best solved in another language.
SNiFF+ for Eiffel is a 'fuzzy parser' which extends the SNiFF+ development environment for use with the object-oriented language Eiffel. You get syntax highlight in the editor, a class browser, cross reference browsing, and much more. It works independent of your Eiffel compiler and can even cope with source files with syntax errors.