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.

Ruby client for creating and managing E2B sandboxes - secure cloud environments for AI-generated code execution. Supports sandbox lifecycle management, command execution, file operations, PTY terminals, git operations, and directory watching.

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

e3db client SDK

This gem is a wrapper around services which provide address lookup by postcode.

No longer maintained. Use defra_ruby_area instead (https://github.com/DEFRA/defra-ruby-area)

ActiveRecord::Batches#find_in_batches has some gotchas. This library provides alternate algorithms that may better suit you, in certain circumstances. Specifically: you can order your results other than by primary key, and you can limit your batches to just a certain range of results not only all records.

The compiler updates/creates models and associations, used in a Ruby on Rails project, defined by EAD automatically.

Read and interpret Eagle Tree telemetry log files.

EDIFACT Generator for the EANCOM Subset

EARL (Eric's Automated Response Line) connects to Mattermost via WebSocket, listens for messages, spawns Claude Code CLI sessions, and streams responses back as threaded replies.

This gem is a more featureful but still drop-in replacement for eassl 0.1.1643

Start your client side out right

Provides a way to design and implement application aspects, through isolated modules

Makes it easy to add Pie charts to Rails 3+ apps

Provide callbacks support for Ruby classes

EasyCols is a flexible command-line utility for extracting specific columns from structured text data in various formats (CSV, TSV, table, plain text). It supports sophisticated parsing options including quote handling, comment stripping, header processing, and language-specific comment patterns. It can be used on both files and STDIN.

An easy to use, simplecov-compatibile code coverage library for Ruby

Onboarding wizard, encrypted-credentials TUI, and 1Password sync. Works inside Rails or standalone.

Bring in Python's decorator pattern for Ruby methods.