E11y (Easy Telemetry) - Observability for Rails developers who hate noise. UNIQUE FEATURES: • Request-scoped debug buffering - buffers debug logs in memory, flushes ONLY on errors • Zero-config SLO tracking - automatic Service Level Objectives for HTTP endpoints and jobs • Schema-validated events - catch bugs before production with dry-schema DEVELOPER EXPERIENCE: • Minimal setup — one config block, works with stdout out of the box • Auto-metrics from events (no manual Yabeda.increment) • Rails-first design (follows Rails conventions) • Pluggable adapters (Loki, Sentry, OpenTelemetry, custom backends) COST SAVINGS: • Reduce log storage costs by 90% (request-scoped buffering) • Replace expensive APM SaaS ($500-5k/month → infra costs only) • Own your observability data (no vendor lock-in) PRODUCTION-READY: • Thread-safe for multi-threaded Rails + Sidekiq • Adaptive sampling (error-based, load-based, value-based) • PII filtering (GDPR-compliant masking/hashing) • Performance optimized (hash-based events, minimal allocations) Perfect for Rails 7.0+ teams who need observability without complexity or high costs.

A flexible E2E testing library allowing pluggable drivers (starting with Playwright) with a clean, unified API.

An early hints Ruby / Rack middleware which just sets Link headers (i.e. for nginx http2_push_preload)

Ruby mixin that facilitates English-like type checking in an inheritance hierarchy via "type_name?" methods

This gem is a powerful and easy to use web development tool that helps developing modern web sites by generating static html pages. It uses CoffeScript, Sass, Haml, Bootstrap, HeadJs, Bower, Grunt, Google Anlaytics and minimizes coffee-, javascript-, sass-, css-, png- and image-files.

Middleware to screen non-JSONAPI-compliant requests, a parser to provide Object Oriented access to requests, and a validator for validating JSONAPI Serialized responses.

Serves static images from a remote server on the dates assigned in their filenames to BERG Cloud

EasyMvc.

Server timing

Rack::Probe provides a set of probes for Rack that fire with each request.

Javascript BDD test framework

Connects your rack app to Edge (http://getedge.io) so you can live edit stylesheets within your app

Simple local server for editing text in your favorite editor.

a rack middle wrapped swagger ui assets

Egalite - yet another web application framework. see description at https://github.com/araipiyo/egalite

Opinionated JSON-API stack to get the job done.

Framework MVC ringan dengan tema modern, sistem routing, dan dukungan multi-database (SQLite & MongoDB).

A modular, concurrent web server built with nio4r.

Basic managment utility for Elasticsearch

A gemed version of elasticsearch-paramedic with Rack support.