Umwelt is a domain architecture development(knowledge management) tool, for handy prototyping domain specification with code structure.

Underworld is a ruby on rails engine which provides a platform to easily build a web application. Features like Dashboard, complex code generation and other awesome features. For more information checkout the docs.

Provides a Result class for more elegant, exception-free error handling. Especially useful for processing input that could be invalid for many different reasons.

Unicorn Standby is on standby until it accepts the request.

A comprehensive Ruby gem that handles document processing, text extraction, and AI-powered analysis for PDF, Word, Excel, PowerPoint, images, archives, and more with a unified API. Includes agentic AI features for document analysis, summarization, and intelligent extraction.

Class table inheritance for ActiveRecord based on updatable views in the database that join parent and children tables

Manage your Uptimerobot monitors from command-line

Command-line version of the Upwords boardgame. Upwords is similar to Scrabble, except you can stack new letters on top of previously-played letters. Play with 1 to 4 human or computer players.

A client for using the UrlCategorise API in Ruby. Built from their api documentation. This is an unofficial project.

A lightweight, dependency-free Ruby gem for accessing USGS NWIS API data (sites, instantaneous values, daily values)

Windows guest support for Hyper-V

Valdations for Plain Old Ruby Objects.

In the last few years, version control for database became best practice. There are several implementations/ways for ruby, however, most of them are focused/dependent on particular frameworks that restrict the migration outside the framework. vcs4sql allows organizing version control for the database(s) in a simple, elegant way without any dependencies on existing frameworks.

Provides client application generators for Vedeu.

Gives you a diff between two versions of gems.

This is a useless tool without any features! Trust me!

A Ruby wrapper library for veritrans Air Direct API

Need to dynamically embed videos from YouTube or Facebook? Extract the video ID easily

ViewComponents for vime.js

virgil-crypto provides: Asymmetric Key Generation, Encryption/Decryption of data and streams, Generation/Verification of digital signatures,PFS (Perfect Forward Secrecy)