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Top 23 C# Python Projects
- Project mention: Stonks or not stonks. Checking Lean trading engine source code | dev.to | 2025-08-04
What is Lean? QuantConnect Lean is an open-source algorithmic trading engine designed for easy strategy research, back testing, and live trading. It runs on Windows, Linux, and macOS, integrating with common data providers and brokerages for rapid deployment of algorithmic trading strategies.
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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Stability Matrix is an open-source project that delivers a user-friendly GUI to manage various AI tools for generating images, animations, and 3D content. It simplifies model management, parameter selection, and image generation, serving as a control panel for the Stable Diffusion model. The project is developed in C# and uses the .NET platform to ensure cross-platform compatibility.
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PythonNet
Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and provides a powerful application scripting tool for .NET developers.
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one-day-one-language
Cómo dar en un día tus primeros pasos en cada lenguaje de programación. Introducción, configuración e instalación, usos habituales, fundamentos, sintaxis y próximos pasos.
- Project mention: My new hobby: watching AI slowly drive Microsoft employees insane | news.ycombinator.com | 2025-05-21
Yes but the improvements are very gradual. It takes years for something to reach maturity. At least for the web stuff which is what I know of.
Eg:
Minimal APIs were released in 2021 but it won't be until .NET 10 that they will have validation. Amazing that validation was not a day one priority for an API. I'm not certain if even in .NET 10 Minimal APIs will have full parity of features with MVC.
Minification of static assets didn't come until .NET 9 released in 2024. This was already commonplace in the JS world a decade earlier. It could have been a quick win so long ago for .NET web apps.
Blazor was released in 2018. 7 years later they still haven't fixed plenty of circuit reconnection issues. They are working on it but progress is also quite slow. Supposedly with .NET 10 session state will be able to be persist etc but it remains to be seen.
OpenAPI is also hit and miss. Spec v3.1 released in 2021 is still not supported. Supposedly it will come with .NET 10.
Not from .NET but they have a project called Kiota for generating clients from OpenAPI specs. It's unusable because of this huge issue that makes all properties in a type nullable. It's been open since 2023. [1]
Etc.
[1] https://github.com/microsoft/kiota/issues/3911
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SwarmUI
SwarmUI (formerly StableSwarmUI), A Modular Stable Diffusion Web-User-Interface, with an emphasis on making powertools easily accessible, high performance, and extensibility.
Source : https://github.com/mcmonkeyprojects/SwarmUI/discussions/716
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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IronPython
Implementation of Python 3.x for .NET Framework that is built on top of the Dynamic Language Runtime.
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CDM
The Common Data Model (CDM) is a standard and extensible collection of schemas (entities, attributes, relationships) that represents business concepts and activities with well-defined semantics, to facilitate data interoperability. Examples of entities include: Account, Contact, Lead, Opportunity, Product, etc.
- Project mention: Show HN: Open-source feature flag tool for progressively releasing new prompts | news.ycombinator.com | 2025-09-21
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On a slightly unrelated note, I am absolutely thrilled about tonybaloney’s other project[1] that automatically generates C# bindings for python. Can’t wait for it to support complete class mappings and finally I will be able to use python ‘type-safely’.
[1] https://github.com/tonybaloney/CSnakes
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CodeProject.AI-Server
CodeProject.AI Server is a self contained service that software developers can include in, and distribute with, their applications in order to augment their apps with the power of AI.
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LDAPmonitor
Monitor creation, deletion and changes to LDAP objects live during your pentest or system administration!
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Aspire
A community project with additional components and extensions for Aspire (by CommunityToolkit)
References https://github.com/dotnet/extensions/tree/main/src/Libraries https://github.com/dotnet/ai-samples#microsoftextensionsai-preview https://github.com/dotnet/aspire https://github.com/CommunityToolkit/Aspire https://github.com/dotnet/eShop https://github.com/dotnet/eShopSupport https://devblogs.microsoft.com/dotnet/e-shop-infused-with-ai-comprehensive-intelligent-dotnet-app-sample/ https://devblogs.microsoft.com/dotnet/introducing-microsoft-extensions-ai-preview/ https://devblogs.microsoft.com/dotnet/build-gen-ai-with-dotnet-8/
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SpleeterGUI
Windows desktop front end for Spleeter - AI source separation - A fork of: https://github.com/boy1dr/SpleeterGui (by thooore)
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Towards-Explainable-AI-System-for-Traffic-Sign-Recognition-and-Deployment-in-a-Simulated-Environment
This project is part of the CS course 'Systems Engineering Meets Life Sciences I' at Goethe University Frankfurt. In this Computer Vision project, we present our first attempt at tackling the problem of traffic sign recognition using a systems engineering approach.
- Project mention: .NET AI & Machine Learning Made Easy: Libraries, Use Cases & Launch-ready Examples | dev.to | 2025-07-28
"Chat with your Data" is a showcase built in Microsoft’s .NET ecosystem that lets employees question their own documents and receive precise, well-sourced answers instead of generic chatbot replies. The solution pairs OpenAI’s latest large language model with a search index in Azure, so each answer is grounded in your organization’s content rather than the public internet.
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WhatsAppDesktop-NoStore
An application developed in C# designed to facilitate the installation and updating of WhatsApp Desktop without requiring the Microsoft Store.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).
C# Python discussion
C# Python related posts
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No questions? The cost of a missing '?' in your project
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Show HN: Open-source feature flag tool for progressively releasing new prompts
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Uncertain<T>
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How to build an OpenAI Agent with persistent memory
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A minimal, complete, Pokémon battle simulation engine optimized for performance
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The Mistake We've Made with Our Open-Source Product: Premature Optimization
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Featbit: Enterprise-level feature flag platform that you can self-host
- A note from our sponsor - Stream getstream.io | 23 Dec 2025
Index
What are some of the best open-source Python projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Lean | 14,059 |
| 2 | blockchain | 8,021 |
| 3 | StabilityMatrix | 7,079 |
| 4 | PythonNet | 5,353 |
| 5 | one-day-one-language | 4,442 |
| 6 | kiota | 3,591 |
| 7 | SwarmUI | 3,481 |
| 8 | IronPython | 2,720 |
| 9 | SpleeterGui | 2,582 |
| 10 | PTVS | 2,564 |
| 11 | CDM | 1,784 |
| 12 | featbit | 1,696 |
| 13 | CSnakes | 1,022 |
| 14 | CodeProject.AI-Server | 915 |
| 15 | LDAPmonitor | 898 |
| 16 | Oryx | 846 |
| 17 | Sandman | 808 |
| 18 | Aspire | 546 |
| 19 | minestat | 356 |
| 20 | SpleeterGUI | 255 |
| 21 | Towards-Explainable-AI-System-for-Traffic-Sign-Recognition-and-Deployment-in-a-Simulated-Environment | 54 |
| 22 | netai-chat-with-your-data | 52 |
| 23 | WhatsAppDesktop-NoStore | 35 |
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