Rollwire detects ActiveRecord::Rollback exceptions that are silently ignored when a nested transaction joins its parent without a savepoint.

Fast CSV using Rust extensions.

RuboCop plugin for ruby reference implementation of ISUCON

A collection of custom RuboCop cops that enforce best practices from the RSpec style guide, including context structure, testing patterns, and FactoryBot usage.

Ruby2HTML empowers developers to write view logic in pure Ruby, seamlessly converting it into clean, well-formatted HTML. Enhance your templating workflow, improve readability, and leverage the full power of Ruby in your views. Features include Rails integration, custom component support, automatic HTML beautification, and C-optimized rendering performance.

RubyBox allows the execution of untrusted Ruby code safely in a sandbox.

RubyDSP is a small gem for rudimentary audio processing, DSP, and synthesis. It aims to have basically zero dependencies (AND WARRANTIES)! See Documentation for more.

API client for activemodel instances

Lightweight Ruby library for converting JSON data to TOON format, achieving 30-60% token reduction for LLM applications

Increase typing speed and keep track of WPM history

Symbol#start_with? and #end_with? methods implemented in Rust

A lightweight, low dependency, high performance S3 API gem with minimal abstraction for interfacing with S3 compatible storage services including AWS S3.

Stream s3 select results

Ruby port and extension of Sanscript.js transliterator by learnsanskrit.org

Track your memory and time performance in console, csv and/or logs.

Scrapetor is a Ruby HTML parsing + scraping toolkit. The parser is a native C arena DOM with structural indexes built at parse time and NEON SIMD scanners in the SAX hot loop. A streaming extraction engine compiles the schema DSL into a single forward pass — no DOM materialised, one Ruby boundary crossing per document. On builds where libcurl is available, Scrapetor::Fetcher adds an HTTP/2-capable fetch layer with per-thread connection cache, shared DNS + TLS session pool, in-process gzip / deflate / brotli / zstd decoding, iconv charset transcoding, retry + exponential backoff, ETag / Last-Modified disk cache with bulk revalidation, per-host throttle, cookie jar, basic + bearer auth, proxy, and three bulk concurrency models (parallel_fetch / multi_fetch / streaming multi_each). Scrapetor::Session ties the cookie / auth / throttle / retry policies together. Also ships robots.txt + sitemap.xml parsers, a bounded-memory streaming HTML parser, and structured-data extractors (JSON-LD, OpenGraph, Schema.org, Microdata, RDFa, Twitter Cards). The Net::HTTP-based Scrapetor.fetch is preserved as the no-libcurl fallback.

Turn hashes into simple log-ready output

Feature Flags, Live Config as a service

Composable multi-type conditions.

A modern semantic logger for Ruby inspired by Serilog.