Fb::Auth provides methods to obtain an access token to manage pages of a Facebook user.

Feature Envy enhances Ruby with features inspired by other programming languages

FFI plugin which adds support for bitmasked types (or flags) to FFI.

Command-line interface (CLI) for the FFI DB registry.

Filigree provides new classes and extensions to core library classes that add functionality to Ruby.

Film Buff provides a Ruby wrapper for IMDb's JSON API, which is the fastest and easiest way to get information from IMDb.

Simple, brute-force method for knowing when something is ready

A rack based static site builder with templates, layouts and project structure based routing.

Gem for using Flickr API in Ruby - https://www.flickr.com/services/api/

Ruby framework for building your Business Logic Layer inside Rails and other frameworks.

copy http request. use shadow proxy server.

Flutterby is a flexible, Ruby-powered, routing graph-based web application framework that will serve your website dynamically or export it as a static site.

Downloads or plays Flash Video (flv) files directly from web-pages.

FileMaker Data API client with ORM features. This gem is a wrapper for other gems: fmrest-core, fmrest-spyke and fmrest-rails.

CLI Templating System and String Formatter

Flexible form builder

Wrapper for the Formstack API

Forspell is spellchecker for code and documentation.It uses well-known hunspell tool and dictionary, provides customizable output, and could be easily integrated into CI pipeline.

Wrapper of freee api. This gem using of wrapper via OAuth2.

A Ruby wrapper for the FullContact API