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Open Source Projects using Ruby

A curated collection of the 77 best open source software using Ruby. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.

Darktable

Professional RAW photo editing and workflow management

  • Stars

    13,323

  • Last commit

    8 hours ago

  • License

    GPL-3.0
Open source photography workflow application for RAW development. Non-destructive editing, professional color management, and GPU acceleration for photographers.

Open Source Alternative to:

Adobe Lightroom

Manticore Search

Lightning-fast open source search engine for big data

  • Stars

    12,068

  • Last commit

    11 hours ago

  • License

    GPL-3.0
Open source search database delivering 2.83x faster performance than Elasticsearch. Features vector search, SQL interface, and full-text capabilities.

Open Source Alternative to:

ElasticSearch

Fizzy

Modern kanban that's fast, fun, and refreshingly simple

  • Stars

    8,268

  • Last commit

    8 hours ago

  • License

    Unknown
Track issues, ideas, and projects with a modern kanban board that's fast and straightforward. Free for 1000 cards, then $20/month for unlimited use.

Open Source Alternative to:

Jira

imgproxy

On-the-fly image resizing and conversion for your own server

  • Stars

    11,144

  • Last commit

    2 days ago

  • License

    Apache-2.0
Self-hosted image processing server that resizes, converts, and optimizes images on demand via URL parameters, with built-in security against common attack vectors.

Open Source Alternative to:

Cloudinary

NHost

Serverless backend platform for modern app development

  • Stars

    9,366

  • Last commit

    9 hours ago

  • License

    MIT
Fully managed backend infrastructure with built-in authentication, database, storage, and serverless functions for rapid application development.

Open Source Alternative to:

Supabase

Highlight

Real-time observability for modern web applications

  • Stars

    9,384

  • Last commit

    1 day ago

  • License

    Apache-2.0
Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.

Open Source Alternative to:

DataDog

Expensify

Simplify expense management for businesses of all sizes

  • Stars

    5,073

  • Last commit

    13 hours ago

  • License

    MIT
Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.

Redmine

Flexible project management you can host yourself

  • Stars

    6,055

  • Last commit

    18 hours ago

  • License

    GPL-2.0
Self-hosted project management web app built on Ruby on Rails with issue tracking, time logging, SCM integration, and multi-project support across any database.

Open Source Alternative to:

Linear

Campfire

Self-hosted group chat without recurring subscription fees

  • Stars

    Stars growing over the last 30 days4,801

  • Last commit

    9 hours ago

  • License

    MIT
Install your own group chat system with @mentions, DMs, and mobile support. One-time purchase, no monthly fees. Includes full source code for customization.

Open Source Alternative to:

Microsoft Teams

Standard Notes

Secure, encrypted notes for your digital life

  • Stars

    6,682

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.

Open Source Alternative to:

Obsidian

LangWatch

AI
Simulation-based testing and evaluation for AI agents

  • Stars

    4,991

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.

Open Source Alternative to:

LangSmith

Zammad

Powerful helpdesk solution for streamlined customer service

  • Stars

    6,028

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Zammad is an open-source helpdesk software that centralizes customer communications and helps deliver great service experiences efficiently.

Open Source Alternative to:

Open

Solidus

Flexible eCommerce platform for brands that stand out

  • Stars

    5,343

  • Last commit

    1 day ago

  • License

    BSD-3-Clause
Open-source eCommerce platform offering customization, scalability and enterprise-grade features for brands of all sizes

Open Source Alternative to:

Shopify

Cerbos

Secure, policy-based access control for modern applications

  • Stars

    4,630

  • Last commit

    2 days ago

  • License

    Apache-2.0
A scalable authorization layer that provides fine-grained access control through externalized policies, enabling secure and flexible permissions management.

Open Source Alternative to:

Auth0

Uptrace

Open source observability platform for modern applications

  • Stars

    4,305

  • Last commit

    3 days ago

  • License

    AGPL-3.0
Uptrace is an OpenTelemetry-based platform that integrates traces, metrics, and logs to help monitor and optimize complex distributed systems.

Open Source Alternative to:

DataDog

Svix

Webhook delivery platform with retries, security, and a portal

  • Stars

    3,463

  • Last commit

    1 day ago

  • License

    MIT
Add customer-facing webhooks to your product without building the infrastructure. Handles retries, signatures, multi-tenancy, filtering, and monitoring at scale.

Open Source Alternative to:

Zapier

Sol

Fast and beautiful launcher for quick access to apps and tools

  • Stars

    3,182

  • Last commit

    4 days ago

  • License

    MIT
A modern macOS launcher that provides instant access to applications, utilities, and system functions through an elegant and efficient interface.

Open Source Alternative to:

Raycast

Swirl Search

AI
Get instant answers from your company knowledge

  • Stars

    3,046

  • Last commit

    6 days ago

  • License

    Apache-2.0
AI-powered search and RAG platform that connects to 100+ enterprise tools without data migration. Deploy securely on-premises with any LLM.

Open Source Alternative to:

Tavily

Chaskiq

Open-source customer communication platform

  • Stars

    3,577

  • Last commit

    4 months ago

  • License

    Unknown
Versatile messaging solution for businesses to engage customers through multiple channels, with AI-powered automation and analytics.

Open Source Alternative to:

Open

HTTPie

Modern command-line HTTP client for the API era

  • Stars

    4,049

  • Last commit

    2 years ago

  • License

    BSD-3-Clause
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.

Open Source Alternative to:

Postman

Quiet

Serverless team chat over Tor, no phone number needed

  • Stars

    2,659

  • Last commit

    6 days ago

  • License

    GPL-3.0
Quiet is a peer-to-peer messaging app that syncs messages directly between devices over Tor, with no central server, no phone number required, and no metadata leaks.

Open Source Alternative to:

Discord

Zero

AI
Terminal coding agent with full model and data control

  • Stars

    Stars growing over the last 30 days1,741

  • Last commit

    3 days ago

  • License

    MIT
Open-source AI coding agent for the terminal that works with 25+ model providers, keeps sessions on your disk, and ships as a single Go binary with no telemetry.

Open Source Alternative to:

Claude Code

Mezon

Create custom spaces to chat, game, and connect globally

  • Stars

    Stars growing over the last 30 days2,012

  • Last commit

    24 hours ago

  • License

    MIT
Build your own community space for gaming, chatting, and hanging out with friends worldwide. Customize your environment for the perfect social experience.

Open Source Alternative to:

Discord

Semaphore

Open source CI/CD platform that's faster and costs less

  • Stars

    1,626

  • Last commit

    1 day ago

  • License

    Unknown
Continuous integration and delivery platform offering faster builds, lower costs, and maintenance-free operations. Cut build times dramatically while reducing CI/CD expenses by 50%.

Open Source Alternative to:

GitHub Actions

Nagios

Complete infrastructure monitoring with 25+ years of expertise

  • Stars

    2,061

  • Last commit

    3 months ago

  • License

    GPL-2.0
Free open source IT monitoring solution for servers, networks, and applications. Trusted by 1M+ users worldwide with powerful alerting and enterprise-grade features.

Open Source Alternative to:

DataDog

RAWmakase

Lightroom-compatible RAW editor, no subscription

  • Stars

    Stars growing quickly over the last 30 days1,260

  • Last commit

    13 hours ago

  • License

    MIT
Non-destructive RAW photo editor for macOS, Linux, and Windows that reads Lightroom catalogs, presets, and camera profiles. Free, MIT licensed, built in Rust.

Open Source Alternative to:

Adobe Lightroom

Sessy

Own your SES email analytics, from send to inbox

  • Stars

    943

  • Last commit

    2 days ago

  • License

    Unknown
Track SES deliveries, bounces, opens and clicks in a self-hosted dashboard with real-time search, analytics and reputation monitoring.

Open Source Alternative to:

Resend

Operately

Open source company management for high-performance startups

  • Stars

    Stars growing over the last 30 days592

  • Last commit

    1 day ago

  • License

    Apache-2.0
Operately is an open source platform that centralizes projects, goals, and processes, helping startups run efficiently without a COO.

Open Source Alternative to:

Jira

Twake Mail

Secure open source email with advanced encryption & AI

  • Stars

    660

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Open source professional email solution with PGP encryption, JMAP protocol, AI-powered responses, and advanced antispam protection. Control your data privately.

Open Source Alternative to:

Gmail

Midori Browser

Fast, secure, and privacy-focused web browsing

  • Stars

    409

  • Last commit

    1 day ago

  • License

    MPL-2.0
Midori Browser is a lightweight, fast, and secure browser that protects users' privacy, available for Windows, Linux, and Android.

Open Source Alternative to:

Firefox

Hackatime

Track coding time across 70+ editors, completely free

  • Stars

    Stars growing over the last 30 days216

  • Last commit

    9 hours ago

  • License

    MIT
Free, open-source coding time tracker compatible with VS Code, JetBrains IDEs, vim, emacs and more. No limits, no paywalls - your data stays yours forever.

Open Source Alternative to:

WakaTime

Capgo

OTA updates for Capacitor apps without app store delays

  • Stars

    211

  • Last commit

    12 hours ago

  • License

    AGPL-3.0
Live update platform for Ionic and Capacitor apps that pushes JavaScript, CSS, and asset changes to devices in minutes, with channels, rollback, and release analytics.

Open Source Alternative to:

Capawesome

Pagecord

Personal blogging platform that meets you where you write

  • Stars

    194

  • Last commit

    8 hours ago

  • License

    MIT
Publish blog posts by email, from Obsidian, iA Writer, the web editor, CLI, or API. Includes RSS, email subscribers, analytics, custom domains, and full export.

Open Source Alternative to:

WordPress

Brace.to

Securely save and access your favorite links across devices

  • Stars

    107

  • Last commit

    6 months ago

  • License

    MIT
A privacy-focused bookmark manager that encrypts your saved links, allowing you to access them anytime, anywhere, on any device with complete control.

Open Source Alternative to:

Pocket

Justnote

Privacy-focused note-taking made simple and fast

  • Stars

    67

  • Last commit

    9 months ago

  • License

    GPL-2.0
Justnote is a secure note-taking app that lets you easily create and sync notes across devices while maintaining full control of your data.

Open Source Alternative to:

Notion
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