Familia: An ORM for Valkey-compatible databases in Ruby.. Organize and store ruby objects in Valkey/Redis

Rack Server API

Searches the FCC's FM, AM, and TV databases

Server-side SDK for evaluating feature flags with Featureflip

Command line tool for tracking achievments, tasks and interactions. You can add work items, view them and run a webserver to share them with other people, for example via screen sharing. This tool is designed to run in a terminal completely local without sharing any data with any other service. No telemetry, no tracking, no data sharing of any kind.

Exposes Firestore operations (inventory management) as MCP tools over stdio.

A clean, idiomatic Ruby interface to the Fizzy API with minimal dependencies

Ruby client for Flagstack feature flag management. Syncs flags to local Flipper adapter for fast reads and offline resilience.

A static site generator.

Ruby SDK for Fluyenta observability platform (fork of brainzlab-ruby). Includes Recall (structured logging), Reflex (error tracking), and Pulse (APM with distributed tracing). Auto-instruments Rails, Sidekiq, GraphQL, Redis, and more.

A comprehensive Ruby client for the Follow Up Boss API with Rails 8 compatibility, secure cookie authentication for SharedInbox, and enhanced features for real estate CRM integration.

Fontisan provides font analysis tools and utilities. It is designed as a pure Ruby implementation with full object-oriented architecture, supporting extraction of information from OpenType and TrueType fonts (OTF, TTF, OTC, TTC). The gem provides both a Ruby library API and a command-line interface, with structured output formats (YAML, JSON, text).

Ford allows you to split a ruby script into stages of a scalable and performant pipeline

Forest is a modern admin interface that works on all major web frameworks. This gem makes Forest admin work on any Ruby application.

Fractor is a lightweight Ruby framework designed to simplify the process of distributing computational work across multiple Ractors.

A thread-safe Ruby client for FreeSWITCH Event Socket Library connections. Focused on inbound mod_event_socket integration with command execution, bgapi jobs, JSON event handling, and reconnect support.

A command line tool to interface with FurAffinity

Fuse Filesystem backed by link shortify

Fast fuzzy string matching for rails

A simple, reliable Ruby gem for sending events to Google Analytics 4 (GA4) using the Measurement Protocol. Features include batch sending, event validation, retry logic, debug mode, and configurable logging. Works with any Ruby application - no framework dependencies required.