Use Mozart with Rails 3

Msg is a general-purpose messaging engine for rails apps. Use it to compose, revise, send and resend messages to selected or generated groups of user-like objects. It uses a simple mustache-based template system.

Easy MultiClient Support for Rails.

A drag-and-drop multi-streaming uploader that uses XHR level 2 and the drag-drop JS API (and no Flash!).

For organizations that want to market a gem in style, Museum uses APIs to provide you with an ever-fresh marketing site for your gems.

Handlebar templates on the server and the client

calender.

Required dependancy for My-Commerce

Generate awesome widgets dashboard for Rails with FlexBox.

Rails gem to provide feedback form for Rails 3 apps.

Simple forum engine.

A cloud based distributed cron, application framework and operations console. Naf works as a distributed script running system that provides scheduling, logging, alarming, machine redundancy, and the ability to set constraint during script execution

This gem provides an easy way to change navbar links based on controller and action in ruby on rails. Usecase: Can be used to activate certain link based on controller.

Allows you to save menu items in the database. You can create your own renderer.

The Waterfall standard UI.

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using jquery.nestable.js plugin with rails asset pipeline

Manage multiple models in the same form

nested_form UI helpers (sortable list, sortable tabs)

Integrates jquery UI Nested Sortable Tree plugin into rails apps.