Renamed to FelECS: https://rubygems.org/gems/felecs

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.

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.

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.

Sometimes a value is set asynchronously and you need to wait until it appears. Easy!