Dev tools · alternatives · 2026
24 alternatives to Cosmos
C# Open Source Managed Operating System
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Cosmos launched in 2016; newer entries below may have overtaken it.
- 1
Cosmos▲114Cosmos is a iOS music player totally free and open-source
2025 · github.com · its alternatives →
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Cosmos Video 3.0▲458A meetings tool to create visibility & a sense of belonging
2022 · cosmos.video · its alternatives →
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Uiverse.io▲3453500+ UI elements, copy the code or use in Figma
2023 · uiverse.io · its alternatives →
- 6
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Microsoft's globally distributed, multi-model database
2017 · learn.microsoft.com · its alternatives →
- 8
Cosmic-light▲84A stunning Dynamic Island Control Center for Windows
Feb 2026 · github.com · its alternatives →
- 9WB
Kalmia started as a small hobby project about two months ago, but it quickly evolved when we needed a better solution to manage our office's documentation. It has now become our go-to tool for both internal and user-facing docs. Recently, we decided to open source it, as we believe others might benefit from a lightweight, customizable documentation system like this. We're excited to see how the community can take it further, contribute, and adapt it to their own needs!
2024 · kalmia.difuse.io · its alternatives →
- 10
Cosmic CLI▲117Hi HN, I'm Tony, founder of Cosmic (a headless CMS). We just open-sourced a CLI that covers the full lifecycle of a content-driven app from creating the content model to deploying to production to updating the codebase all without leaving the terminal. Here's what the full workflow looks like: # Create a project with an AI-generated content model cosmic projects create # → "A recipe blog with recipes, categories, and authors" # Generate content cosmic content -p "Create 5 recipes with images across different categories" # Build a full-stack app wired to your content cosmic build -p "A modern…
Feb 2026 · cosmicjs.com · its alternatives →
- 11
Orchestra▲75Open source system for coordinating experts and machines
2015 · orchestra.b12.io · its alternatives →
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Beautiful Open▲132Beautiful sites for Open Source projects
2014 · beautifulopen.com · its alternatives →
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Netlify CMS▲236An open-source CMS for your Git workflow
2017 · harta-europei.com · its alternatives →
- 17
Fuchsia▲30Google's mysterious new open source Operating System
2016 · github.com · its alternatives →
- 18
- 19AD
Hi, Piotr here I was collecting nice open-source companies for quite some time now. Mostly to take some inspiration and learn from their code. Last week, I though it would be fun to learn this Astro thing everyone's talking about. So I thought building a directory website out of this collection was pretty good idea. After 2 days of building, OpenAlternative was born. It's a community driven list of open source alternatives to proprietary software and applications. Enjoy and thank you for your support!
2024 · openalternative.co · its alternatives →
- 20
Global document, key/value, or graph database service
2017 · learn.microsoft.com · its alternatives →
- 21
The open world (galaxy?) version of a really great iOS game!
2015 · store.steampowered.com · its alternatives →
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Cosmos Extension adds support for Cosmos to MetaMask
2023 · metamask.mysticlabs.xyz · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →