Open Source Projects using JavaScript
A curated collection of the 673 best open source software using JavaScript. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
Comprehensive monitoring and incident management platform
Stars
7,557Last commit
3 hours agoLicense
Apache-2.0
All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly
Open Source Alternative to:
Simple yet powerful CI/CD engine with great extensibility
Stars
7,808Last commit
8 hours agoLicense
Apache-2.0
Open-source CI/CD platform using Docker containers for pipeline execution. Create multiple workflows, extend with plugins, and enjoy free lifetime access.
Open Source Alternative to:
Simplify expense management for businesses of all sizes
Stars
5,016Last commit
56 minutes agoLicense
MIT
Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.
Auto-generated network diagrams that stay current
Stars
5,672Last commit
2 hours agoLicense
AGPL-3.0
Discovers your network via SNMP, LLDP, and ARP, then builds and maintains L2/L3 topology diagrams, host inventories, and service dependency maps automatically.
Open Source Alternative to:
Security-first diagramming with no login required
Stars
7,912Last commit
2 days agoLicense
Apache-2.0
Create professional diagrams online or offline with security-first approach. No registration needed. Works with Google Drive, SharePoint, Atlassian, and more.
Open Source Alternative to:
Visual app builder that integrates with your existing codebase
Stars
6,986Last commit
15 hours agoLicense
MIT
Open-source visual editor for building websites and web apps. Connect to any data source, design custom UIs, and ship production React code without leaving your stack.
Open Source Alternative to:
Open-source serverless CMS for modern web projects
Stars
8,032Last commit
4 hours agoLicense
MIT
A powerful, scalable platform for building custom websites and apps with serverless architecture, offering flexibility and cost-efficiency.
Open Source Alternative to:
Effortless API mocking for seamless development
Stars
8,390Last commit
6 hours agoLicense
MIT
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Open Source Alternative to:
Open-source cloud communications platform for developers
Stars
8,096Last commit
3 days agoLicense
MIT
Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.
Open Source Alternative to:
Unified observability database for metrics, logs, and traces
Stars
6,598Last commit
9 hours agoLicense
Apache-2.0
Cloud-native observability database unifying metrics, logs, and traces with sub-second queries, 50x cost reduction, and seamless OpenTelemetry integration.
Open Source Alternative to:
Secure email, calendar and contacts with end-to-end encryption
Stars
7,891Last commit
4 hours agoLicense
GPL-3.0
Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.
Open Source Alternative to:
Secure collaboration with end-to-end encryption
Stars
7,880Last commit
12 hours agoLicense
AGPL-3.0
Open-source collaboration suite offering encrypted document editing, file sharing, and team workspaces with complete privacy protection.
Open Source Alternative to:
Dashboard for running multiple coding agents in parallel
Stars
5,588Last commit
4 hours agoLicense
Apache-2.0
Desktop app that runs 25+ coding agents simultaneously, each isolated in its own Git worktree, so you can orchestrate code changes without switching tools.
Open Source Alternative to:
Self-hosted file sharing built for digital sovereignty
Stars
5,884Last commit
5 hours agoLicense
Apache-2.0
Self-hostable cloud file management and collaboration platform with an integrated office suite, zero-trust security, and GDPR compliance for teams and organizations.
Open Source Alternative to:
Ad-free photo sharing with privacy and federation
Stars
7,087Last commit
16 hours agoLicense
AGPL-3.0
Decentralized photo sharing platform with chronological feeds, privacy controls, and ActivityPub federation. No ads, no algorithms, just authentic connections.
Open Source Alternative to:
Launch Your Store in Minutes, No Code Needed
Stars
5,484Last commit
1 day agoLicense
MIT
Fast, modern e-commerce with instant setup and full customization. Powered by Stripe for seamless transactions.
Open Source Alternative to:
Build reliable AI apps with comprehensive observability
Stars
6,130Last commit
4 days agoLicense
Apache-2.0
Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.
Open Source Alternative to:
Transform SQL into beautiful data stories
Stars
6,903Last commit
22 hours agoLicense
MIT
Create data-driven websites and reports using SQL and Markdown, with automatic visualizations and interactive elements.
Open Source Alternative to:
Open-source legal AI that law firms control and extend
Stars
4,171Last commit
3 hours agoLicense
AGPL-3.0
Self-hostable alternative to Harvey and Legora with document analysis, contract drafting, tabular review, and reusable workflows. Zero licensing costs, full data control.
Open Source Alternative to:
Flexible project management you can host yourself
Stars
6,026Last commit
14 hours agoLicense
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:
Build stateful backends with in-memory actors
Stars
6,102Last commit
2 hours agoLicense
Apache-2.0
Open-source infrastructure for long-lived, in-memory processes called Actors. Combines state and compute with sub-millisecond latency, realtime capabilities, and horizontal scaling.
Open Source Alternative to:
Automated translations that scale with your code and commits
Stars
5,401Last commit
5 hours agoLicense
Apache-2.0
Transform your app into a global product with AI-powered localization that integrates directly into your development workflow. Supports 83+ languages with Git-native automation.
Open Source Alternative to:
Sync and transform data from any source to any destination
Stars
6,510Last commit
7 hours agoLicense
MPL-2.0
CloudQuery is an open-source ELT platform that enables easy data integration from hundreds of cloud and security tools to any destination.
Open Source Alternative to:
AI-powered embedded AR/AP automation for platforms
Stars
8,341Last commit
2 years agoLicense
AGPL-3.0
Crater offers AI-driven invoicing workflows, payments, and working capital tools to enhance your platform with minimal technical effort.
Open Source Alternative to:
Desktop SQL client with built-in MCP for AI agent access
Stars
4,677Last commit
5 hours agoLicense
Apache-2.0
Desktop database client for PostgreSQL, MySQL/MariaDB, SQLite, and 14+ more databases, with a built-in MCP server, SQL notebooks, visual query builder, and a plugin system.
Open Source Alternative to:
Self-hosted cloud platform with automated security
Stars
6,139Last commit
4 days agoLicense
Unknown
Complete self-hosting solution with automated maintenance, Smart-Shield protection, anti-DDoS, SSO authentication, and VPN access for secure private cloud management.
Open Source Alternative to:
Open source kanban boards with unlimited everything
Stars
5,545Last commit
1 hour agoLicense
AGPL-3.0
Free kanban project management with unlimited boards, lists, and cards. Import Trello boards, collaborate with teams, and self-host for complete control.
Open Source Alternative to:
Open-source BI for modern data teams
Stars
6,119Last commit
1 hour agoLicense
MIT
Self-serve analytics platform that transforms dbt models into interactive dashboards, enabling data-driven decisions across organizations.
Open Source Alternative to:
Virtual office platform for engaging remote collaboration
Stars
5,743Last commit
1 hour agoLicense
Unknown
Create customizable virtual workspaces for remote teams to interact naturally, host events, and collaborate through spontaneous conversations and scheduled meetings.
Open Source Alternative to:
Intercept, modify, and debug HTTP(S) requests effortlessly
Stars
6,755Last commit
10 hours agoLicense
AGPL-3.0
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
Open Source Alternative to:
Organize and secure your documents in one central hub
Stars
5,274Last commit
12 hours agoLicense
AGPL-3.0
A document management platform that helps you archive, organize, and search files with email ingestion, tagging capabilities, and powerful search functionality.
Open Source Alternative to:
Open source metering and billing infrastructure for any pricing model
Stars
4,749Last commit
7 hours agoLicense
AGPL-3.0
A flexible billing platform that handles usage-based metering, credit management, and subscription billing, giving developers full control over pricing models.
Open Source Alternative to:
The open-source, affordable email platform
Stars
5,421Last commit
9 hours agoLicense
AGPL-3.0
Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.
Open Source Alternative to:
Enterprise monitoring for networks, apps, and infrastructure
Stars
6,337Last commit
8 hours agoLicense
AGPL-3.0
Monitors networks, servers, cloud services, IoT, and OT environments with no per-device licensing fees, available self-hosted or as a managed SaaS platform.
Open Source Alternative to:
Feature flags and remote config for rapid deployment
Stars
6,537Last commit
1 hour agoLicense
BSD-3-Clause
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.
Open Source Alternative to:
Secure, scalable API key management for developers
Stars
5,428Last commit
1 hour agoLicense
AGPL-3.0
Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.
Open Source Alternative to:
Self-hosted group chat without recurring subscription fees
Stars
4,574Last commit
2 days agoLicense
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:
Smart desktop AI assistant with powerful local knowledge features
Stars
5,345Last commit
2 months agoLicense
Unknown
Cross-platform desktop AI assistant supporting multiple providers, local knowledge base, and custom prompts. Integrates MCP protocol for enhanced AI tool capabilities.
Open Source Alternative to:
Secure, encrypted notes for your digital life
Stars
6,618Last commit
5 hours agoLicense
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:
Build scalable authorization in minutes, not months
Stars
5,946Last commit
16 hours agoLicense
AGPL-3.0
Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with Google Zanzibar-inspired architecture.
Open Source Alternative to:
Free, cross-platform video editor that's easy to learn
Stars
6,424Last commit
3 days agoLicense
GPL-3.0
A free, open-source video editor for Linux, Mac, and Windows with animation, effects, multi-track editing, and 3D title rendering.
Open Source Alternative to:
Continuous web-based localization for global reach
Stars
6,051Last commit
2 hours agoLicense
GPL-3.0
Web-based continuous localization platform with version control integration, quality checks, and clean interface. Used by 2,500+ projects in 165+ countries.
Open Source Alternative to:
Stellar Hosted – Managed Open Source software hosting in the EU: secure, compliant, fast.
Openlane
InfluxDB
Docmost