I've built a C# IDE, Runtime, and AppStore inside Excel
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…
I've built a C# IDE, Runtime, and AppStore inside Excel launched on January 25, 2023 with 670 votes, #3 of 3,901 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
QueryStorm is a C# and VB.NET IDE, runtime, and app store integrated into Excel as an alternative to VBA. It includes a debugger, NuGet package support, and lets developers publish extensions to an AppStore accessible to anyone with the free runtime. The tool is designed for Excel users and developers who want to build and share Excel extensions using modern .NET languages. A community license provides free access for individuals and small companies.
written from the facts on this page · September 2026
From the sources
Run C# scripts, create custom functions, and automate workbooks with C#. QueryStorm is a C# IDE and runtime in Excel that fully replaces VBA.
Build awesome things in Excel with the full power of .NET and SQL Get the best of both worlds, the power of SQL and the flexibility of Excel. I spend a fair amount of time writing code in C#, which I enjoy. I occasionally wish I could use C# inside other applications. One application where I think C# would fit right in is Excel, as a replacement for VBA. VBA is a bit (a lot) behind the times and Microsoft isn't planning on upgrading it. Instead, they're offering a sandboxed JavaScript environment called Office Scripts. I see the appeal of JavaScript for the web version of Excel, but a good replacement for VBA, it is not. Since Microsoft won't be doing it, I figured I might have a crack at…from querystorm.com
In the maker’s words, at launch
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…
Does a similar job
all alternatives →
I created an Excel plugin for using SQL inside Excel2015 · thingiequery.com · ▲13
10 Years to Build a Free SQL Editor2024 · timestored.com · ▲355I have spent large parts of the last 10+ years building an SQL Editor. The tool is targeted at data analysts, a lot of effort has gone into charting, visualizing and excel export. If this sounds useful to you, it's Free, please give it a try and let me know any feedback.
Datagridxl2.js – Fast Excel-like data table library2022 · datagridxl.com · ▲301I'm Robbert, the creator of DataGridXL.js. Last month I released version 2 which includes many new features. DataGridXL is a free (and commercial) editable data table library written in ES6. My goal is to develop the most performant & user-friendly spreadsheet-like data table out there: - It has zero dependencies. You don’t need any framework to use DataGridXL. - It is lightweight (~250kb) and easy to use. It does not even require messing with CSS. - It has its own Virtual DOM implementation to prevent DOM errors. - Developer friendly. Supports all modern web browsers Please take a look at…
Turn an Excel file into a web application2019 · keikai.io · ▲386A collection of spreadsheet examples for turning Excel to web, editing online and building spreadsheet applications using Keikai.
I built a spreadsheet app with Python to make data science easier2019 · hackernoon.com · ▲84Today I'm open sourcing "Grid studio", a web-based spreadsheet application with full integration of the Python programming language.
OpenSheetFeb 2026 · opensheet.app · ▲86Hi folks. I've been doing some experiments on how LLMs could get more handy in the day to day of working with files (CSV, Parquet, etc). Earlier last year, I built https://datakit.page and evolved it over and over into an all in-browser experience with help of duckdb-wasm. Got loads of feedbacks and I think it turned into a good shape with being an adhoc local data studio, but I kept hearing two main things/issues: Why can't the AI also change cells in the file we give to it? Why can't we modify this grid ourselves? So besides the whole READ and text-to-SQL flows, what seemed…
More work this month
the category →
Endless lofi beats composed live in your browser, over pixel-art nights in Paris, Tokyo, New York, Hong Kong, Sydney, San Francisco and more. Free, no sign-up.
Work · 23d ago · loficities.com
Smooth Recorder▲257Mac screen recordings that look edited when you hit stop
Work · 17d ago · smoothrecorder.com
Work · 11d ago · readrare.com
Source: Show HN post ↗ · launch text quoted in part
Launched alongside, January 2023
the whole month →
This works suprisingly well. Just give it instructions like "make it winter" or "remove the cars" and the photo is altered. Here are some examples of transformations it can make: Golden gate bridge: https://raw.githubusercontent.com/brycedrennan/imaginAIry/ma... Girl with a pearl earring: https://raw.githubusercontent.com/brycedrennan/imaginAIry/ma... I integrated this new InstructPix2Pix model into imaginAIry (python library) so it's easy to use for python developers.
AI · 2023 · github.com
HyperSwitch▲715Fast, reliable, and affordable open source payments switch
Dev tools · 2023 · hyperswitch.io
Hey HN! Some more info: I’m an NHS doctor and the founder of Pi-A (https://www.pi-a.io) which developed Lungy (https://www.lungy.app). Lungy is an app (iOS only for now) that responds to breathing in real-time and was designed to make breathing exercises more engaging and beneficial to do. It hopefully has many aspects of interest to the HN community – real-time fluid, cloth and soft body sims running on the phone’s GPU. My background is as a junior surgical trainee and I started building Lungy in 2020 during the first COVID lockdown in London. During COVID, there were…
Life & fun · 2023 · lungy.app
Integrate into your product within minutes
Dev tools · 2023 · cloudflare.com