Feature Envy enhances Ruby with features inspired by other programming languages

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

Bindings to libpcap via FFI interface in Ruby.

Fidgit is a GUI library built on Gosu/Chingu

Fidgit is a GUI library built on Gosu/Chingu

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.

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.

Flexible form builder

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.

Funky is a Ruby library to fetch data about videos posted on Facebook, such as their title, description, number of views, comments, shares, and likes. Funky can obtain those public data regardless of whether you have insight permission. Funky is fully tested.

Furnace is a static code analysis framework for dynamic languages, aimed at efficient type and behavior inference.

The fxruby library is an excellent wrapper for the FOX toolkit. However, it reflects the C++-ness of FOX, rather than being more Ruby-like. As such, creating composed objects with it tends to be rather ugly and cumbersome. fxruby-enhancement is a wrapper for the wrapper, to "rubyfy" it and make it more easy to use for Rubyists. fxruby-enhancement is basically a DSL of sorts, and every effort has been taken to make it intuitive to use. Once you get the hang of it, you should be able to look at the FXRuby API documentation and infer the DSL construct for fxruby-enhancement.