AuthEng is just Devise only with a different flow.

Authentication engine for AIHS

Atreides is an engine providing a evented CMS following a KISS principle

bp3-formtastic adapts formtastic for BP3 (persuavis/black_phoebe_3).

Generates views for use with inherited resources, saving on time when creating new models

Cable Admin Engine for Rails 3

Calagator is an open source community calendaring platform

Admins for Clearance

Gem packaging of Catarse, a crowdfunding application.

Extracted from shop2, site-rest

Helper and Formtastic support for a select box whose value depends on another field.

Derail is a collection of helpers and libraries which I use in \ almost every project, and a generator to get started quickly.

Formtastic form builder for Devise with some extra features like full I18n support and dynamic page titles.

Easy template layout for Rails

Formtastic aware WYSIWYG text-area editor (deprecated)

Description of EspAuth.

ESP's gemset

Description of EspPermissions.

Cms that uses devise, ckeditor, and the twitter bootstraps

Includes authentication, tracking, and lots of convenience methods