Sure, ruby is dynamic and that is one of its greatest strength. Object polymorphisms, duck typing, and the like is great in ruby, there is a time and place for everything. Sometimes, it just makes more sense to be strongly typed.

A simple utility gem

Export and import json from a definable format

Makes it simple to set arbitrary config key/value pairs on a class.

A set of simply useful classes. Contains extensions to core Ruby classes.

simrpc is a simple Ruby module for rpc communication, using Apache QPID as the transport mechanism.

An EventSource push service for Ruby

Sinatra application that allow us to have an admin dashboard with minimal effort.

Helpers for building RESTful APIs in Sinatra.

Handy helpers for writing RESTful APIs in Sinatra.

Ruby gem to create a basic scaffold sinatra app with activerecord.

Object-Oriented layer of presentation logic to your Sinatra apps.

A Sinatra extension for building Shopify Embedded Apps. Akin to the shopify_app gem but for Sinatra

Default, standard sinatra helpers

Every page has footnotes that give information about your application.

A generator library for the Sinatra Ruby web framework

Base class for quickly setting up RESTful services through Sinatra.

Simple nested routes for Sinatra.

A named routes Sinatra DSL inspired by Rails routing

Make Rails controller actions look like Sinatra routes