There are only a few way to calculate prorations & manage recurring payments.

Ruby lib for consuming the Billwise SOAP/XML API

Create install scripts without the complexity of shell commands.

Terraform's HCL lacks quite many programming features like iterators, true variables, advanced string manipulation, functions etc. This Ruby tool provides an easy-to-use DSL to define Terraform compatible .json files which can then be used with Terraform side-by-side with HCL files.

Bitcoin reward era gem. 100% BigDecimal arithmetic.

Bitcurex API

Automated Web-Scraping Client for Ruby using SLD2-like configuration files. Supports XPath and CSS selectors via Nokogiri.

Experimental/educational cryptography/math library.

Bixby Agent

Bixby Provisioner

This is an incredibly colorful highlighting formatter for structured log events. It is visually similar to Ruby's `Logger::Formatter`, but can display additional color-highlighted metadata on the same line or on subsequent lines.

A Ruby library for working with the Blesta Resellers API

BMC

The official Facebook Business API SDK for Ruby. https://developers.facebook.com/docs/marketing-api/sdks'

Fetch books metadata using Amazon Product Advertising API

declare bookmarks in a yaml file, merge them into your Chrome bookmarks

A framework that generates PDF and e-Pub from Markdown, and HTML files.

An internal DSL for creating/managing Hashes and Arrays. You will not use it since it only suits me tastes.

Picking containers, boxes, cartons, packages based on items weight

Dervivatives Processor borrowed heavily from Samvera hydra-derivatives with the added benefit of being decoupled to ActiveFedora