Antivirus for S3 buckets
ThinkingSphinx + Resque delta indexing.
Sphinx plugin for ActiveRecord/Rails
SAML SSO for Ruby
Check password strength against several rules. Includes ActiveRecord/ActiveModel support.
A generalized Rack middleware for importing contacts from major email providers.
Ruby client for Exchange Web Services
AngularJS wrapper for select2 (deprecated, use angular-ui/ui-select)
This Rails plugin extends ActiveRecord::Base to add automatic updating of created_by and updated_by attributes of your models in much the same way that the ActiveRecord::Timestamp module updates created_(at/on) and updated_(at/on) attributes.