Open Source Projects using Vitest
A curated collection of the 266 best open source software using Vitest. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
Self-host your own scheduling page, no vendor required
Stars
49,303Last commit
5 days agoLicense
MIT
Cal.diy is the community edition of Cal.com for personal self-hosting, with calendar sync, video conferencing, payment support, and a REST API.
Open Source Alternative to:
Self-hosted Git service for seamless collaboration
Stars
58,677Last commit
9 hours agoLicense
MIT
A lightweight, fast, and customizable Git service that simplifies code hosting and collaboration for teams of all sizes.
Open Source Alternative to:
Open-source UI design and prototyping for product teams
Stars
61,613Last commit
1 day agoLicense
MPL-2.0
Design, prototype, and hand off to developers in one platform. Supports design systems, tokens, flexible layouts, and AI workflows with real CSS/HTML output.
Open Source Alternative to:
Personal AI agent for messaging apps, containerized
Stars
31,005Last commit
13 hours agoLicense
MIT
Self-hosted AI agent that connects to WhatsApp, Telegram, Slack, and a dozen more messaging apps, running each agent in an isolated Docker container with credential injection via a secure vault.
Open Source Alternative to:
Publishing platform for blogs, newsletters, and paid memberships
Stars
55,598Last commit
8 hours agoLicense
MIT
Publish content, send email newsletters, and sell paid subscriptions from one platform. Used by independent journalists, creators, and businesses like YCombinator and Kickstarter.
Open Source Alternative to:
A full desktop environment that runs in your browser
Stars
43,875Last commit
7 hours agoLicense
AGPL-3.0
Puter is a cloud-based desktop OS you run in the browser, with built-in apps, file storage, and support for hosting web apps and sites.
Open Source Alternative to:
Team chat, project management, and AI agents in one place
Stars
Stars growing over the last 30 days36,420Last commit
4 hours agoLicense
Apache-2.0
Workspace that combines team chat, project planning, and git management with AI agents that collaborate alongside your team on shared context.
Open Source Alternative to:
Free instant whiteboard with real-time collaboration
Stars
51,069Last commit
12 hours agoLicense
Unknown
Virtual whiteboard that works instantly on any device, no signup required, with real-time multiplayer collaboration built in.
Open Source Alternative to:
Run AI models locally or connect to cloud, privately
Stars
45,063Last commit
7 hours agoLicense
Apache-2.0
Jan runs open-source AI models on your own hardware or connects to cloud providers like OpenAI, Anthropic, and Google, keeping your conversations off third-party servers.
Open Source Alternative to:
Decentralized social networking in your control
Stars
50,446Last commit
4 hours agoLicense
AGPL-3.0
A free, open-source social media platform that puts users in charge of their data and connections
Open Source Alternative to:
AI-powered research notebook with full privacy control
Stars
40,540Last commit
4 days agoLicense
MIT
Combines AI summarization, podcast generation, and multi-format content ingestion for researchers and students who want to keep their data private.
Open Source Alternative to:
AI-powered coding made simple and efficient
Stars
Stars growing quickly over the last 30 days29,825Last commit
3 hours agoLicense
MIT
Advanced AI coding assistant that enhances development workflow with intelligent code suggestions, automated debugging, and seamless integration.
Open Source Alternative to:
Headless CMS for developers, built with Node.js
Stars
45,468Last commit
19 hours agoLicense
MIT
A powerful, flexible, and developer-friendly content management system that prioritizes customization and scalability.
Open Source Alternative to:
Cultivate vibrant online communities with ease
Stars
48,004Last commit
3 hours agoLicense
GPL-2.0
A powerful, customizable platform for building and managing online forums, fostering engaging discussions and collaborative spaces.
Open Source Alternative to:
Effortless deployment and management for any VPS
Stars
38,004Last commit
18 hours agoLicense
Unknown
Streamline your deployment process with Dokploy. Manage applications and databases on any VPS using Docker and Traefik for improved performance and security.
Open Source Alternative to:
Build AI copilots for your product in hours, not months
Stars
38,213Last commit
4 hours agoLicense
MIT
Integrate production-ready AI copilots into any product quickly and easily with CopilotKit's open-source platform.
Open Source Alternative to:
Open source LLM engineering platform for AI-powered applications
Stars
Stars growing over the last 30 days36,359Last commit
8 hours agoLicense
MIT
Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.
Open Source Alternative to:
Open-source coding agent for your IDE and terminal
Stars
36,310Last commit
7 hours agoLicense
Apache-2.0
Runs source-controlled AI checks on every pull request, enforcing your engineering standards as native GitHub status checks with suggested fixes.
Open Source Alternative to:
Omnichannel customer support with a built-in AI assistant
Stars
38,180Last commit
13 hours agoLicense
MIT
Manage customer conversations across live chat, email, WhatsApp, Instagram, and more from one inbox, with an AI assistant that suggests replies and automates common questions.
Open Source Alternative to:
Cut and trim video without re-encoding or quality loss
Stars
45,177Last commit
6 hours agoLicense
GPL-2.0
Desktop app for lossless video and audio editing. Cut, trim, merge, and remux files in seconds without re-encoding, using FFmpeg under the hood.
Open Source Alternative to:
Open-source e-commerce for modern developers
Stars
36,927Last commit
1 day agoLicense
MIT
Flexible, customizable e-commerce platform with headless architecture, built-in features, and extensive plugin ecosystem for scalable online stores.
Open Source Alternative to:
Build powerful AI knowledge bases with ease
Stars
29,907Last commit
12 hours agoLicense
Unknown
FastGPT is a free, open-source platform for creating AI-powered knowledge bases with data processing, model invocation, and visual workflows.
Open Source Alternative to:
Zero-config VPN with WireGuard for secure networking
Stars
Stars growing over the last 30 days38,029Last commit
3 hours agoLicense
BSD-3-Clause
Deploy a modern WireGuard-based VPN with zero configuration. Connect devices securely across clouds, VPCs, and on-premises networks without firewall rules.
Open Source Alternative to:
Secure authentication and access control made simple
Stars
37,497Last commit
20 hours agoLicense
Apache-2.0
Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and services.
Open Source Alternative to:
AI coding agent for VS Code, JetBrains, CLI, and Cloud
Stars
27,735Last commit
15 hours agoLicense
MIT
Open source AI coding agent with 500+ models, bring-your-own-key support, and specialized modes for writing, debugging, and planning code across IDEs and CLI.
Open Source Alternative to:
Open source AI coding agent for the terminal and IDE
Stars
28,699Last commit
3 hours agoLicense
Apache-2.0
Terminal-based AI coding agent that reads your codebase, edits files and runs commands, with support for Qwen, OpenAI, Anthropic, Gemini and local models.
Open Source Alternative to:
Framework-agnostic authentication for TypeScript applications
Stars
30,450Last commit
5 hours agoLicense
MIT
A comprehensive authentication framework offering email/password, social sign-on, two-factor auth, and multi-tenant support with full TypeScript integration.
Open Source Alternative to:
Secure cloud collaboration platform for organizations
Stars
37,278Last commit
3 hours agoLicense
AGPL-3.0
Nextcloud offers on-premises file sync, sharing and collaboration platform with advanced security and privacy features.
Open Source Alternative to:
Powerful API development and testing made effortless
Stars
40,073Last commit
16 hours agoLicense
Apache-2.0
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
Open Source Alternative to:
Open-source data platform for effortless content management
Stars
38,629Last commit
1 day agoLicense
Unknown
A versatile headless CMS and API engine that simplifies data management, content creation, and application development.
Open Source Alternative to:
Save links, notes, and images. AI tags them for you.
Stars
29,956Last commit
4 hours agoLicense
AGPL-3.0
Self-hostable bookmark manager that saves links, notes, images, and PDFs, then automatically tags and organizes them using AI for faster retrieval.
Open Source Alternative to:
Open blueprints for governed, always-on AI agents
Stars
22,834Last commit
3 hours agoLicense
Apache-2.0
Collection of open blueprints combining models, agent harnesses, and runtime controls to deploy specialized autonomous AI agents with policy-based guardrails.
Open Source Alternative to:
AI-powered code completion for seamless development
Stars
33,921Last commit
4 months agoLicense
Apache-2.0
Self-hosted AI coding assistant that enhances productivity with context-aware suggestions and privacy-focused implementation.
Open Source Alternative to:
Local-first envelope budgeting with full data ownership
Stars
29,722Last commit
3 hours agoLicense
MIT
Privacy-focused personal finance app using envelope budgeting, multi-device sync, optional end-to-end encryption, and bank sync for US, EU, and UK users.
Open Source Alternative to:
Secure, private photo storage and sharing solution
Stars
29,570Last commit
6 hours agoLicense
AGPL-3.0
End-to-end encrypted cloud storage for photos and videos, offering privacy, security, and seamless cross-device syncing.
Open Source Alternative to:
Secure secret management for modern development teams
Stars
29,972Last commit
16 hours agoLicense
MIT
End-to-end encrypted secret management platform for seamless integration and enhanced security in development workflows.
Open Source Alternative to:
Declarative workflow orchestration for data, AI, and infra
Stars
Stars growing over the last 30 days29,981Last commit
1 day agoLicense
Apache-2.0
YAML-based orchestration platform with 1400+ plugins for running data pipelines, AI workflows, and infrastructure automation across teams at scale.
Open Source Alternative to:
Automate workflows with no-code integration platform
Stars
25,204Last commit
6 hours agoLicense
MIT
Open-source integration platform for seamless workflow automation. Connect apps, automate tasks, and boost productivity effortlessly.
Open Source Alternative to:
Screen recorder with instant sharing and a built-in editor
Stars
Stars growing over the last 30 days23,679Last commit
3 hours agoLicense
AGPL-3.0
Record your screen in Instant, Studio, or Screenshot mode, then share via a link with auto-generated transcripts, chapters, and summaries.
Open Source Alternative to:
Branded short links with analytics and conversion tracking
Stars
24,935Last commit
8 hours agoLicense
AGPL-3.0
Link management platform for marketing teams with custom domains, UTM builder, A/B testing, geo-targeting, QR codes, and real-time conversion analytics.
Open Source Alternative to:
Affiliate marketing platform built for SaaS companies
Stars
24,935Last commit
8 hours agoLicense
AGPL-3.0
Run affiliate, influencer, and referral programs with flexible reward structures, real-time attribution, and automated global payouts.
Open Source Alternative to:
Spaced repetition flashcards that remember for you
Stars
32,268Last commit
1 day agoLicense
Unknown
Flashcard app using spaced repetition to schedule reviews at the exact moment you're likely to forget, so you retain more with less study time.
Open Source Alternative to:
Postiz – The All-in-One agentic social media scheduling tool
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