Assay MiniTest defines a set of MiniTest-compatible assertion and extension method which seemlessly delegate on Assay assertions. This allows developers to change test frameworks without having to completely rewrite a slew of previously written MiniTest-based tests and/or sepcifications.

Assay TestUnit defines a set of TestUnit-compatible assertion methods which depend on Assay's assertion classes. This allows developers to change test frameworks without having to change a slew of previously defined assertions.

Fluidity is a test assertions framework built on top of the Assay assertions meta-framework. It provides an elegant fluid notation for specifying test assertions.

RSpecial defines a set of RSpec-compatible matcher methods which are BRASS compliant by using Assay as a backend. This allows developers to switch to BRASS compliant test frameworks without having to change a slew of previously written RSpec-based specifications.