Completely free open source software

Browse free and open source software that is completely free to use. Every tool listed here offers a free plan or is free of charge — no cost barriers to get started.

All-in-one Office Suite for Everyone, Free, Compatible, Shareable.

FreemiumWindowsmacOSLinuxAndroidiOS

1Panel is a modern, open source Linux server operations management panel.

FreemiumLinux

Enterprises and developers use Algolia’s AI search infrastructure to understand users and show them what they’re looking for.

FreemiumWindowsmacOSLinux

An open-source monitoring system with a dimensional data model, flexible query language, efficient time series database and modern alerting approach.

FreeWindowsmacOSLinux

A Q&A platform software for teams at any scale. Whether it’s a community forum, help center, or knowledge management platform, you can always count on Answer.

FreeWindowsmacOSLinuxAndroidiOS

Start monitoring in 30 seconds. Use advanced SSL, keyword and cron monitoring. Get notified by email, SMS, Slack and more. Get 50 monitors for FREE!

FreemiumWindowsmacOSLinux

An open-source cross-platform diary app build with Fultter. Feature Cross-platform support: 🌍 Compatible with Android, iOS, Windows, MacOS, Linux*. Material Design: 🎨 The interface is intuitive and user-friendly, and follows the Material Design specifications. Multiple editors: 📝 supports markdown, plain text, rich text and other forms of text editing. Multimedia accessories: 📷 You can add pictures, audio, video or even draw a picture to your diary. Search and classification: 🔍 Easily manage your diary by full-text search and categorization. Custom theme: 🌈 Supports light and dark modes, as well as a variety of color schemes. Custom fonts: ✍️ Supports importing different fonts, and supports variable fonts. Data security: 🔒 Keep your diary safe with a password, supports biometric unlocking. Export and share: 🧾 Support all data import/export, as well as single diary sharing. Backup and synchronization: ☁ Support for LAN synchronization and WebDav backup. Trail Map: 🗺️ See your footprints on a map. Every step of your life is worth documenting. Intelligent assistant: 💬 Supports access to third-party large models, provides Q&A, sentiment analysis and other functions. Local Natural Language Processing (NLP): 🤖 A more secure intelligent assistant that lets your diary know you better.

FreeWindowsmacOSAndroidiOS

DBeaver Community is a free cross-platform database tool for developers, database administrators, analysts, and everyone working with data. It supports all popular SQL databases like MySQL, MariaDB, PostgreSQL, SQLite, Apache Family, and more.

FreeWindowsmacOSLinux

What is uTools? uTools is a new generation of efficiency tool platform, free combination of plug-in applications, to create your own tool set.

FreeWindowsmacOSLinux

Microsoft Remote Desktop

Use the Microsoft Remote Desktop app to connect to a remote PC or virtual apps and desktops made available by your admin. The app helps you be productive no matter where you are.

FreeWindowsmacOSAndroidiOS

Key features Open-source, modern AI chat interface for managing, building, and running AI agent teams. Works across multiple LLM providers, letting you switch or combine models in one place. Supports self-hosting for full control over your data and deployment. Extensible via plugins to add custom tools and capabilities. Rich feature set covering chat organization, agent management, and team workflows. Platforms: Windows, macOS, Linux Links Official website: https://lobehub.com/ Source code: https://github.com/lobehub/lobe-chat Pricing Free and fully open-source under Apache-2.0. You can self-host it or use the public demo.

FreeWindowsmacOSLinux

Key features Provides a persistent memory layer designed for AI agents and applications. Enables storing, retrieving, and managing user memories across multiple sessions. Supports semantic memory capabilities to help agents recall relevant context over time. Offers self-hostable open-source infrastructure for developer use. Platforms: Windows, macOS, Linux Links Official website: mem0.ai Source code: github.com/mem0ai/mem0 Pricing: Completely free and open-source under Apache-2.0; self-host and use without any licensing costs.

FreeWindowsmacOSLinux

Tencent Meeting

Based on more than 20 years of Tencent audio and video communication experience, Tencent Conference provides one-stop audio and video conferencing solutions, so that you can experience high-definition and smooth meetings and conference collaboration anytime and anywhere.

FreemiumWindowsmacOSAndroidiOS

✨ Featured sponsor: CodeRabbit — Industry-leading AI code reviews . Memos Your thoughts, your data, shared on your terms. Memos is a timeline for your notes, and it belongs to you. Write in Markdown, post in seconds, and choose who sees each memo: just you, the people you invite, or anyone with the link. Run with Docker · Try the live demo · Read the docs Why Memos? Write first — Save a thought without choosing a title or folder. Memos are written in Markdown and can include images and files. Find it later — Search, filter by tag, or look back through any day on the timeline. Pin what matters and save the filters you reuse as views. Yours to keep — Self-host Memos with zero telemetry , MIT-licensed source , and a full export of your memos. Share when you choose — New memos are private. Make one visible to signed-in users or public when you want to share it. Explore all features → Quick Start Run Memos with Docker: docker run -d \ --name memos \ -p 5230:5230 \ -v ~ /.memos:/var/opt/memos \ neosmemo/memos:stable Other install options are in the deployment guide . Releases use YY.MM , with optional point releases such as 26.09.1 and release candidates such as 26.09-rc.1 . Calendar release tags have no v prefix. The Docker stable tag follows stable releases; canary follows development builds. If upgrading from a release before v0.31.0, run v0.31.0 successfully. See the upgrade requirements for earlier versions. Web Clipper Save pages, selections, and images from your browser straight into Memos as source-linked Markdown. Get the Memos Web Clipper for Chrome or Firefox . Sponsors Love Memos? Sponsor the project on GitHub . Get Help Read the docs , join Discord , or ask in GitHub Discussions . Found a bug or have an idea? Open an issue . To contribute, see the contributing guide . Star History

FreeWindowsmacOSLinuxAndroidiOS

DingTalk Meeting

Dingding conference official website, providing first-class enterprise video conferencing system and online collaboration tools. Secure, stable, simple, and powerful remote meeting experience to meet the needs of enterprises of different sizes, support multi-platform access, and ensure enterprise data security. Seamless remote collaboration makes meetings more efficient and simple.

FreemiumWindowsmacOSLinuxAndroidiOS

Key features Build AI agents and RAG (retrieval-augmented generation) pipelines through a visual interface. Deploy the resulting AI agents and RAG pipelines from the same platform. Free Community Edition available under a custom license. The custom license restricts offering multitenant LLM app development platforms as a service. Source code hosted publicly on GitHub. Links Official website: https://dify.ai Source code repository: https://github.com/langgenius/dify Pricing Freemium. The Dify Community Edition is free to use under a custom license, but the license restricts offering multitenant LLM app development platforms as a service.

FreemiumWindowsmacOSLinux

Your digital notebook One cross-functional notebook for all your notetaking needs.

FreeWindowsmacOS

Key features Self-hosted AI runtime covering text, voice, vision, and agent capabilities. OpenAI-compatible API, making it a practical free alternative to the OpenAI API. Runs LLMs and other AI models locally, keeping data on your own hardware and off external services. Works across Windows, macOS, Linux, and Raspberry Pi OS. Fully open source under the MIT license — no usage limits or API fees. Platforms: Windows, macOS, Linux, Raspberry Pi OS Links Official website: https://localai.io Source code: https://github.com/mudler/LocalAI Pricing Free. Completely free and open source under the MIT license; self-host all AI features without usage limits or API fees.

FreeWindowsmacOSLinuxRaspberry Pi OS

cppla ServerStatus

Cloud probes, multi-server probes, cloud monitoring, multi-server cloud monitoring

FreeWindowsmacOSLinux

prompts.chat The world's largest open-source prompt library for AI Works with ChatGPT, Claude, Gemini, Llama, Mistral, and more formerly known as Awesome ChatGPT Prompts 🌐 Browse Prompts • 📖 Read the Book • 📄 View on GitHub • 🚀 Self-Host 🏆 Featured in Forbes · 🎓 Referenced by Harvard , Columbia · 📄 40+ academic citations · ❤️ Most liked dataset on Hugging Face ⭐ 143k+ GitHub stars · 🏅 GitHub Staff Pick · 🚀 First prompt library (Dec 2022) Loved by AI pioneers: Greg Brockman (OpenAI Co-Founder) · Wojciech Zaremba (OpenAI Co-Founder) · Clement Delangue (Hugging Face CEO) · Thomas Dohmke (Former GitHub CEO) What is this? A curated collection of prompts for AI chat models. Originally created for ChatGPT, these prompts work great with any modern AI assistant. Browse Prompts Data Formats prompts.chat prompts.csv PROMPTS.md Hugging Face Dataset Want to contribute? Add prompts at prompts.chat/prompts/new — they sync here automatically. 📖 The Interactive Book of Prompting Learn prompt engineering with our free, interactive guide — 25+ chapters covering everything from basics to advanced techniques like chain-of-thought reasoning, few-shot learning, and AI agents. Start Reading → (Source: https://github.com/f/prompts.chat/tree/main/src/content/book ) 🎮 Prompting for Kids An interactive, game-based adventure to teach children (ages 8-14) how to communicate with AI through fun puzzles and stories. Start Playing → 🚀 Self-Hosting Deploy your own private prompt library with custom branding, themes, and authentication. Quick Start: npx prompts.chat new my-prompt-library cd my-prompt-library Manual Setup: git clone https://github.com/f/prompts.chat.git cd prompts.chat npm install && npm run setup The setup wizard configures branding, theme, authentication (GitHub/Google/Azure AD), and features. Recommended database: prompts.chat uses PostgreSQL. For a hosted database, we recommend Neon . Sponsored by 📖 Full Self-Hosting Guide • 🐳 Docker Guide 🔌 Integrations CLI npx prompts.chat Claude Code Plugin /plugin marketplace add f/prompts.chat /plugin install [email protected] 📖 Plugin Documentation MCP Server Use prompts.chat as an MCP server in your AI tools. Remote (recommended): { "mcpServers" : { "prompts.chat" : { "url" : " https://prompts.chat/api/mcp " } } } Local: { "mcpServers" : { "prompts.chat" : { "command" : " npx " , "args" : [ " -y " , " prompts.chat " , " mcp " ] } } } 📖 MCP Documentation 💖 Sponsors Built with Windsurf and Devin Become a Sponsor → 👥 Contributors 📜 License This project is dual-licensed: Source code and site-authored content is licensed under the MIT License , including the interactive book content in src/content/book . Prompt content and data (prompts.csv, PROMPTS.md, user-submitted prompts) is dedicated to the public domain under CC0 1.0 Universal . See LICENSE for details.

FreeWindowsmacOSLinux

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Acorn 7 is a Mac image editor for editing photos and creating graphics.

AI / LLM Inference

AI/LLM Inference delivers fast, scalable deployment of large language models for generating AI responses.

AI & Machine Learning

Free open-source AI & machine learning tools.

Ad Blocker is a browser tool that removes intrusive ads and pop-ups from web pages.

AdGuard is a cross-platform ad blocker that filters web content and protects privacy.

Adobe Premiere Pro

Adobe Premiere Pro is a professional video editing software for film, TV, and web.

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