Open Source Projects using JavaScript
A curated collection of the 717 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.
Spreadsheet-like interface for PostgreSQL databases
Stars
5,158Last commit
16 hours agoLicense
GPL-3.0
A self-hosted tool that provides an intuitive, spreadsheet-style interface for viewing, editing, and querying PostgreSQL databases without technical expertise.
Open Source Alternative to:
Powerful observability made simple for developers
Stars
4,521Last commit
17 hours agoLicense
MIT
Logfire offers intuitive observability tools for Python applications, combining logs, profiling, and telemetry in one platform.
Open Source Alternative to:
Stateful AI agents that remember, learn, and improve over time
Stars
Stars growing over the last 30 days3,699Last commit
11 hours agoLicense
Apache-2.0
Build persistent AI agents with continuous memory, scheduled tasks, and multi-channel communication via Slack, Discord, and Telegram, using your own API keys.
Open Source Alternative to:
Effortless group scheduling for seamless collaboration
Stars
5,318Last commit
1 day agoLicense
AGPL-3.0
A user-friendly, open-source tool for coordinating events and meetings without the hassle of back-and-forth emails or messages.
Open Source Alternative to:
Open-source data integration for modern stacks
Stars
5,111Last commit
1 day agoLicense
MIT
Collect, transform, and sync data across your entire infrastructure with a flexible, code-based approach to data integration.
Open Source Alternative to:
Effortless time tracking for teams and projects
Stars
5,095Last commit
13 hours agoLicense
AGPL-3.0
Open-source time tracking solution for businesses of all sizes. Manage projects, track billable hours, and generate insightful reports.
Open Source Alternative to:
Free open-source appointment booking for any business
Stars
4,458Last commit
5 days agoLicense
GPL-3.0
Self-hosted appointment scheduling solution with Google Calendar sync, customizable workflows, and no monthly fees. Perfect for healthcare, salons, and service businesses.
Open Source Alternative to:
Effortlessly manage events and sell tickets online
Stars
4,074Last commit
15 hours agoLicense
Unknown
Hi.Events is a comprehensive platform for event management and online ticket sales, offering features like QR code check-in, custom ticket types, and embeddable widgets.
Open Source Alternative to:
Self-hosted team workspace with chat, docs, and databases
Stars
5,170Last commit
7 months agoLicense
Apache-2.0
Local-first collaboration platform combining real-time chat, rich text pages, databases, and file management in a single self-hostable workspace.
Open Source Alternative to:
Build powerful websites with the open-source CMS
Stars
4,296Last commit
19 hours agoLicense
GPL-2.0
A flexible and extensible content management system for creating dynamic websites and digital experiences
Open Source Alternative to:
Craft flexible, powerful websites with ease
Stars
4,909Last commit
19 hours agoLicense
Unknown
A flat-file CMS that combines simplicity and flexibility, empowering developers to build custom websites without database complexity.
Open Source Alternative to:
Lightweight distributed storage for self-hosting
Stars
Stars growing over the last 30 days4,760Last commit
1 day agoLicense
AGPL-3.0
Self-contained distributed object storage with S3 API compatibility. Runs on minimal hardware, replicates data across 3 zones for maximum resilience.
Open Source Alternative to:
A spreadsheet engine you can embed, self-host, or run in the browser
Stars
4,228Last commit
21 hours agoLicense
Apache-2.0
IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.
Open Source Alternative to:
System-wide ad-blocking and privacy protection, no extensions needed
Stars
4,296Last commit
1 day agoLicense
MIT
Free, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.
Open Source Alternative to:
YAML-defined workflow orchestration, no database required
Stars
Stars growing over the last 30 days4,433Last commit
8 hours agoLicense
GPL-3.0
Single-binary workflow orchestrator that runs scheduled DAGs locally or over SSH, with retries, human tasks, a built-in Web UI, and file-based state storage.
Open Source Alternative to:
Build powerful backends without leaving your browser
Stars
6,842Last commit
2 years agoLicense
Apache-2.0
A low-code platform for creating robust backends, complete with a spreadsheet UI for easy data management and custom functions.
Open Source Alternative to:
Open-source helpdesk for seamless customer support
Stars
4,611Last commit
9 hours agoLicense
AGPL-3.0
Self-hosted email management system with shared inboxes, automation, and powerful collaboration features for efficient customer support.
Open Source Alternative to:
Open-source growth platform for customer-centric teams
Stars
4,094Last commit
16 hours agoLicense
AGPL-3.0
All-in-one solution for marketing, sales, and customer service. Boost engagement, streamline workflows, and drive growth.
Open Source Alternative to:
Open source security automation platform for builders
Stars
3,860Last commit
13 hours agoLicense
AGPL-3.0
Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.
Open Source Alternative to:
Deploy apps instantly with git push - open source alternative
Stars
4,775Last commit
8 months agoLicense
MIT
Open source deployment platform that deploys apps directly from GitHub with zero-downtime, real-time logs, preview URLs, and support for Python, Node.js frameworks.
Open Source Alternative to:
Secure, policy-based access control for modern applications
Stars
4,630Last commit
1 day agoLicense
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:
Feature-rich backend that runs anywhere you need it
Stars
3,775Last commit
1 month agoLicense
Apache-2.0
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.
Open Source Alternative to:
Free office suite with Microsoft compatibility
Stars
Stars growing over the last 30 days4,553Last commit
9 hours agoLicense
GPL-3.0
Complete free office suite compatible with Microsoft formats (.doc, .docx, .xls, .xlsx, .ppt, .pptx). Open source alternative with regular updates.
Open Source Alternative to:
Git-native feature management for developers
Stars
4,926Last commit
16 hours agoLicense
GPL-3.0
A feature flag platform that integrates with Git workflows, enabling developers to manage features directly in their codebase.
Open Source Alternative to:
Track coding time effortlessly, gain insights instantly
Stars
4,462Last commit
3 days agoLicense
MIT
Open-source, self-hosted time tracking solution for developers. Analyze coding habits, improve productivity, and visualize progress.
Open Source Alternative to:
Open source observability platform for modern applications
Stars
4,305Last commit
2 days agoLicense
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:
Open-source ticketing system for streamlined support
Stars
3,443Last commit
16 hours agoLicense
AGPL-3.0
Frappe Helpdesk consolidates customer issues, automates workflows, and empowers self-service to boost agent productivity and customer satisfaction.
Open Source Alternative to:
Create powerful forms with ease and flexibility
Stars
Stars growing over the last 30 days3,866Last commit
1 day agoLicense
AGPL-3.0
A versatile open-source form builder for collecting data, managing submissions, and integrating with your favorite tools.
Open Source Alternative to:
Secure and elegant Matrix client for seamless conversations
Stars
3,943Last commit
4 days agoLicense
AGPL-3.0
Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.
Open Source Alternative to:
Your digital identity, beautifully organized
Stars
3,916Last commit
2 days agoLicense
AGPL-3.0
A free, open-source link management platform for creating customizable, self-hosted link pages to showcase your online presence.
Open Source Alternative to:
Automate financial processes for smarter business decisions
Stars
3,957Last commit
1 day agoLicense
AGPL-3.0
Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.
Open Source Alternative to:
One API to deploy and run agents on any model or machine
Stars
Stars growing quickly over the last 30 days3,214Last commit
9 hours agoLicense
Apache-2.0
Production-ready agent infrastructure that handles state, machines, permissions, and history so you don't have to build the platform yourself.
Open Source Alternative to:
AI-powered platform for engineering LLM products
Stars
Stars growing over the last 30 days3,434Last commit
15 hours agoLicense
Apache-2.0
Laminar is an open-source platform that helps collect, understand, and utilize data for building high-quality LLM applications.
Open Source Alternative to:
Browser and notebook combined with local-first AI
Stars
3,610Last commit
2 months agoLicense
Apache-2.0
A browser that doubles as a personal notebook, letting you research, summarize, and take notes on web pages, PDFs, and videos without switching apps.
Open Source Alternative to:
Quick access to apps and files with keyboard shortcuts
Stars
4,610Last commit
1 day agoLicense
MIT
A keyboard-driven launcher that helps you quickly find and open applications, files, and bookmarks across Windows, macOS, and Linux
Open Source Alternative to:
Next-gen WebSockets server for real-time apps
Stars
5,631Last commit
2 years agoLicense
AGPL-3.0
Open-source, Pusher-compatible WebSockets server that's simple, fast, and resilient for building real-time applications.
Open Source Alternative to:
Convert wearable data into actionable health insights with open algorithms
Stars
Stars growing over the last 30 days2,705Last commit
21 hours agoLicense
MIT
Self-hosted health intelligence platform with open algorithms, AI reasoning engine, and zero per-user fees. Connect Apple Health, Whoop, Garmin, Oura, and more.
Open Source Alternative to:
Open-source code security engine for developers
Stars
Stars growing over the last 30 days3,227Last commit
1 day agoLicense
LGPL-2.1
Opengrep is a community-driven fork of SemgrepCE, providing accessible static code analysis and security scanning for developers.
Create stunning data visualizations with ease
Stars
4,062Last commit
4 days agoLicense
MIT
A powerful, open-source platform for building interactive dashboards and charts from multiple data sources without coding.
Open Source Alternative to:
Effortlessly split expenses with friends and roommates
Stars
3,012Last commit
2 days agoLicense
MIT
A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.
Open Source Alternative to:
Open source agency management tool for streamlined success
Stars
3,259Last commit
1 day agoLicense
AGPL-3.0
Worklenz is a comprehensive project management platform that helps agencies organize tasks, track resources, and boost productivity.
Open Source Alternative to:
Create engaging surveys and gather valuable insights
Stars
3,778Last commit
10 hours agoLicense
Unknown
LimeSurvey is a powerful open-source tool for creating customizable online surveys, polls, and questionnaires.
Open Source Alternative to:
c15t – Open-source cookie banner, built for control and lightening fast modern web apps.
CodeRabbit
Stellar Hosted
Bright Data