Dev tools · alternatives · 2026

Ristretto is an open-source code playground and notebook application built using its own technology. It provides a sandboxed environment where developers can write and execute code interactively. The tool is… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Ristretto, an OSS sandboxed code playground/notebook written in itself launched in 2024; newer entries below may have overtaken it.

1. 1GI
   gist.io, blogless writing for hackers▲286

   2012 · gist.io · its alternatives →

2. 2
   Marimo – an open-source reactive notebook for Python▲448

   Hi HN! We’re excited to share marimo, an open-source reactive notebook for Python [1]. marimo aims to solve well-known problems with traditional notebooks [2]: marimo notebooks are reproducible (no hidden state), git-friendly (stored as Python files), executable as Python scripts, and deployable as web apps. GitHub repo: https://github.com/marimo-team/marimo In marimo, a notebook’s code, outputs, and program state are always consistent. Run a cell and marimo reacts by automatically running the cells that reference its declared variables. Delete a cell and marimo scrubs…

   2024 · github.com · its alternatives →

3. 3
   Maestri▲183

   An infinite canvas where coding agents work in concert

   Mar 2026 · themaestri.app · its alternatives →

4. 4
   I've built a C# IDE, Runtime, and AppStore inside Excel▲670

   The project is called QueryStorm. It uses Roslyn to offer C# (and VB.NET) support in Excel, as an alternative to VBA. I've posted about it before, but a lot has changed since then so figured I'd share an update. The current version includes a host of new features, namely a C# debugger, support for NuGet packages, and the ability to publish Excel extensions to an "AppStore" (which is essentially a NuGet repository). The AppStore can be used by anyone with the (free) runtime component. Another great addition is the community license, which is a free license for individuals and small companies…

   2023 · querystorm.com · its alternatives →

5. 5
   Webstudio Beta▲647

   An open source Webflow alternative

   2023 · webstudio.is · its alternatives →

6. 6RA
   RinohType – A modern LaTeX in 6500 lines of Python▲153

   I originally planned to release RinohType into wild only after I had finished a full review, refactoring and documenting of the code. I also wanted to write some API documentation and a small tutorial, all in the spirit of making a good first impression. Turns out all this takes a ...

   2013 · mos6581.org · its alternatives →

7. 7
   A simple Go web server with logging, tracing, health check▲318

   GitHub Gist: instantly share code, notes, and snippets.

   2018 · gist.github.com · its alternatives →

8. 8
   Cannoli – A compiler for a subset of Python written in Rust▲292

   Cannoli Programming Language. Contribute to joncatanio/cannoli development by creating an account on GitHub.

   2018 · github.com · its alternatives →

9. 9
   A Spatial Environment for Python▲169

   Hi all! A little background: I've been working on natto.dev, a spatial environment for JavaScript. I'm really excited about new interfaces for code (leveraging metaphors we're good at, spatial reasoning, making state visible, design tools, etc). With all the buzz around PyScript, I discovered Pyodide and got it working inside natto. This Python version is a stripped down version of https://natto.dev (eg interactive outputs, multiplayer) so please check that out if this interests you. I'm excited to share this spatial environment for Python. Imagine Jupyter cells arranged on a 2D…

   2022 · python.natto.dev · its alternatives →

10. 10
    Molab, a cloud-hosted Marimo notebook workspace▲123

    We launched marimo [1], an open-source reactive Python notebook, last year on HackerNews. Today, the most popular recent feature request in Google Colab’s issue tracker asks for marimo support in Colab [2]. Rather than try to convince Google to replace their notebook with marimo, we decided to just build our own cloud-hosted notebook service instead. We're calling this molab (mo for marimo), and we're launching it today. You can try it at https://molab.marimo.io Some features: - Persistent storage - Link sharing (notebooks are public but undiscoverable, like secret GitHub Gists) -…

    2025 · molab.marimo.io · its alternatives →

11. 11PA
    Primo – a visual CMS with Svelte blocks, a code editor, and SSG▲356

    Primo represents your entire site as files. Pull it down, edit with Claude Code, Cursor, or any AI agent, push it back. Your team manages content visually in the browser.

    2023 · primocms.org · its alternatives →

12. 12
    Wing Playground▲253

    Iterate on cloud apps in milliseconds, not minutes

    2024 · winglang.io · its alternatives →

13. 13VT
    Val Town – A Cloud Scripting Site▲332

    Hey HN! We're so excited to show you Val Town (https://val.town)! A "val" is a JavaScript/TypeScript function or value that runs on our servers. We aim to get you from idea to running code in seconds: type code, run it, get its API endpoint, schedule it - all from the browser, in a couple keystrokes. We're a startup of 4 people, mostly in NYC. We've been working on this for 6 months and are eager for feedback from the HN community. Why do we need yet another online coding IDE? While researching devtools[1], I found myself wanting something halfway between Replit and Zapier: a…

    2023 · val.town · its alternatives →

14. 14
    Gitfox▲129

    The foxy Git client for Mac

    2019 · gitfox.app · its alternatives →

15. 15
    WASM-powered codespaces for Python notebooks on GitHub▲204

    Hi HN! Last year, we shared marimo [1], an open-source reactive notebook for Python with support for execution through WebAssembly [2]. We wanted to share something new: you can now run marimo and Jupyter notebooks directly from GitHub in a Wasm-powered, codespace-like environment. What makes this powerful is that we mount the GitHub repository's contents as a filesystem in the notebook, making it really easy to share notebooks with data. All you need to do is prepend 'marimo.app' to any Python notebook on GitHub. Some examples: - Jupyter Notebook:…

    2025 · docs.marimo.io · its alternatives →

16. 16
    A notebook-style Common Lisp environment▲180

    The notebook-style Common Lisp environment. Contribute to tamamu/darkmatter development by creating an account on GitHub.

    2017 · github.com · its alternatives →

17. 17
    Netlify CMS▲236

    An open-source CMS for your Git workflow

    2017 · harta-europei.com · its alternatives →

18. 18
    Prometeo – a Python-to-C transpiler for high-performance computing▲166

    An experimental Python-to-C transpiler and domain specific language for embedded high-performance computing - zanellia/prometeo

    2021 · github.com · its alternatives →

19. 19
    marimo▲252

    The next-generation Python notebook

    2024 · marimo.io · its alternatives →

20. 20
    Paseo – Beautiful open-source coding agent interface▲92

    Hey HN, I'm Mo. I've been building Paseo, an open source environment for running Claude Code, Codex, and OpenCode across desktop, mobile, web, and CLI. It started last September as a push-to-talk voice interface for Claude Code. I wanted to talk to an agent while going on walks. Then I wanted to see what it was doing. Then text it when I couldn't talk. Then review diffs, run multiple agents, and manage work across machines. After a lot of iteration, it turned into a broader environment. The basic model is: - A daemon runs on your machine (MacBook, desktop, VPS, etc.). - Clients connect to it…

    Jun 2026 · github.com · its alternatives →

21. 21
    Marimo VS Code extension – Python notebooks built on LSP and uv▲65

    Hi HN! We're excited to release our VS Code/Cursor extension for marimo [1], an open-source, reactive Python notebook. This extension provides a native experience for working with marimo notebooks, a long-requested feature that we’ve worked hard to get right. An LSP-first architecture The core of our extension is a marimo notebook language server (marimo-lsp [2]). As far as we know, it’s the first notebook runtime to take this approach. The Language Server Protocol (LSP) [3] offers a small but important set of notebook-related capabilities that we use for document and kernel syncing;…

    Nov 2025 · github.com · its alternatives →

22. 22CC
    Chunk – Code sandbox for back-end devs▲96

    Chunk co-founder here. We spent the last 2 weeks building this to scratch our own itch: As developers, we often have problems that could be solved just by running a few lines of code. Sometimes, running this code on your local machine is fine. But other time, the code need to run automatically reacting to external events or to run continuously, which means, it needs to run on a server somewhere. So now, you have to find a cloud provider, to package or build the code and finally to deploy it. All of that for what could be literally be 4 lines of code. We couldn’t find an easier way to do…

    2022 · chunk.run · its alternatives →

23. 23
    I made a CMS that uses Git to store your data▲203

    I'm excited to finally launch Outstatic, an open source static website CMS that doesn't require a complicated setup or signing up to a third-party service! You can access the documentation here: Outstatic Documentation. I invite you to start by deploying our example blog to Vercel and giving it a try. I think you'll be pleasantly surprised at how easy and fun it is to use Outstatic. Please, let me know what you think. This is the first public version of the project and all feedback is welcome. If you dig the project feel free to leave a star on Github. I appreciate your support!

    2022 · outstatic.com · its alternatives →

24. 24
    Sandy – A tiny Sandbox to run untrusted code ️▲64

    A tiny "sandbox" to run untrusted code 🏖️. Contribute to craigmulligan/sandy development by creating an account on GitHub.

    2020 · github.com · its alternatives →

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 →