Library to create invoices in the XRechnung format.

Read, write and convert XRechnung and ZUGFeRD electronic invoices (e-Rechnung) according to EN 16931. Supports UBL 2.1 and UN/CEFACT CII syntaxes with dedicated classes for Invoice, Credit Note, Corrected Invoice, Self-billed Invoice, Partial Invoice and Prepayment Invoice.

Abachrome provides a robust set of tools for working with various color formats including hex, RGB, HSL, and named colors. Features support for multiple color spaces (RGB, HSL, Lab, Oklab), color space conversion, gamut mapping, CSS color parsing and formatting, and high-precision color calculations using BigDecimal.

Exposes ActiveAdmin resources and pages as a graphql-ruby schema with an HTTP endpoint per namespace.

ActiveModel::Caching is a versatile gem for managing structured, temporary data using a caching backend, typically Rails cache for Rails applications. This gem provides an easy-to-use API for storing, retrieving, and manipulating data structures like scalars, lists, and JSON, making it simple to handle transient data without adding extra dependencies.

A gem that provides logging functionality for ActiveRecord models, storing logs in a separate table with support for log chains, metadata, and different visibility levels.

Automatic reconnection for Postgres

Extension for ActiveRecord to get serializable and marshalizable models using Rasti::Model

Snapshots for ActiveRecord

Mix Calculable into any model to get effective-dated, versioned formulas, apportionment and aggregation helpers, and Liquid-rendered output — reusable across payroll, e-commerce, and insurance domains.

Rails gem to allowing records to leave footprints

Builds a dashboard's COLLECTION_FILTERS from its ATTRIBUTE_TYPES: substring and exact matching for text columns, comparisons and ranges for numbers and dates, and association ids, instead of one hand-written lambda per column.

Ruby client for Affirm.com /api/v1/transactions with compatibility helpers for legacy affirm-ruby call sites.

Build XML descriptions of aeronautical infrastructure either as AIXM 4.5 (Aeronautical Information Exchange Model) or OFMX 1 (Open FlightMaps eXchange).

A simple gem to calculate amortizing loan payments, as part of training at Samyukti

Amounts provides a precise Amount value object with atomic integer storage, safe registered-type arithmetic, explicit conversion rates, display helpers, and an optional ActiveRecord integration layer.

A Ruby gem for calculating anthropometric z-scores and percentiles based on the WHO and CDC 2000 growth chart data.

A basic adaptor to send HTTP requests and parse the responses. Intended to bootstrap the quick writing of Adaptors for specific APIs, without having to write the same old JSON request and processing time and time again.

Code project template renderer

Ruby SDK for ARCP: envelope and message model, fiber-based runtime, client, WebSocket / stdio / in-memory transports, SQLite-backed resume log, capability negotiation, leases with budget and expiration, streamed results, and OpenTelemetry trace propagation. Built on socketry/async.