Data mapping & transformation

Provides a nice DSL to describe your CSV document. CSV documents can be validated against this description. You can easily define types like Integer or Array for CSV through converters.

FindBug is a Sentry-like error tracking and performance monitoring gem that stores data locally using Redis and your database. Features include exception capture, performance instrumentation, alerting, and a built-in dashboard.

Extensions for Finder classes

Firebase Authentication uses ID Token. This gem verify the token on the server side.

Firewall Agent is a utility to simplify firewall configuration for clouds and clusters, especially when hosted with 3rd party VPS services.

The "fiscal" gem helps to retrieve the fiscal year, half year, quarter and month along with start and end dates for many countries.

Plugin for read-only content websites with MongoDB storage. Works perfect with Rambler&Co CQRS projects

Super easy to use (but lots of dependencies :/) parser

Flamingo makes it easy to wade through the Twitter Streaming API by handling all connectivity and resource management for you. You just tell it what to track and consume the information in a resque queue. Flamingo isn't a traditional ruby gem. You don't require it into your code. Instead, it's designed to run as a daemon like redis or mysql. It provides a REST interface to change the parameters sent to the Twitter Streaming resource. All events from the streaming API are placed on a resque job queue where your application can process them. CAVEAT EMPTOR: This gem is alpha code so act accordingly.

Library for processing flat files

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

load and dump fixtures.

This gem is an object-oriented wrapper for the Flickr API.

Floe is a runner for Amazon States Language workflows.

Ruby interface to the AMEE carbon calculator

FlowChat is a Rails framework for building sophisticated conversational interfaces across USSD and WhatsApp platforms. Create interactive flows with menus, prompts, validation, media support, and session management. Features include multi-tenancy, background job processing, built-in simulator for testing, and comprehensive middleware support.

This is a library that wraps the [fluent-logger gem](https://github.com/fluent/fluent-logger-ruby) and provides easy integration with your Rails application. This includes log formatters that support [Rails tagged logging](https://api.rubyonrails.org/classes/ActiveSupport/TaggedLogging.html) for JSON format that can be sent to Fluentd (or really any other logging backend).

MySQL Binlog input plugin for Fluentd event collector.

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.