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Top 23 dotnet-core Open-Source Projects
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> hypothetical cold start times
Long standing complaint about .NET / .NET Core
2017 Github issue: https://github.com/dotnet/core/issues/1060
2018 Github issue: https://github.com/dotnet/core/issues/1968
Regular people complaining, asking, and writing about it for years: https://duckduckgo.com/?t=ffab&q=cold+start+NET.&ia=web
Right up to this thread, today.
Why are you denying that this exists?
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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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awesome-dotnet-core
:honeybee: A collection of awesome .NET core libraries, tools, frameworks and software
I have a confession to make. I love writing automated tests. That's why I've created awesome-dotnet-testing – a curated list of awesome .NET libraries and tools that help ensure code quality through automated testing. While my source of inspiration was awesome-dotnet-core, sadly that massive project doesn't seem to be actively maintained anymore, with some notable projects missing, and some obsolete. This is why I have started a new categorised list with a focus solely on testing, and I'm going to keep it up to date and comprehensive. I've even learned a few new things along the way, even though I've been working with testing on .NET for a long time. So I would be happy if it helps someone.
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You can find the road map here.
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Bitwarden - Open-source password manager.
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amplication
Amplication brings order to the chaos of large-scale software development by creating Golden Paths for developers - streamlined workflows that drive consistency, enable high-quality code practices, simplify onboarding, and accelerate standardized delivery across teams.
Project mention: Top 15 Open-Source Low-Code Projects with the Most GitHub Stars | dev.to | 2024-07-18GitHub https://github.com/amplication/amplication GitHub Stars 14.8k Most Recent Update on GitHub Within one day Open Source License Apache 2.0 Number of Active Contributors This Year 15 Acceptance of External PRs Yes Official Website https://amplication.com/ Documentation https://docs.amplication.com/
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Entity Framework
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
Project mention: Mastering EF Core Interceptors: Hook into the Pipeline with the Decorator Pattern | dev.to | 2025-04-19EF Core GitHub Repository
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ABP
Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.
Project mention: Most Popular .NET Domain-Driven Design (DDD) Resources: Top 5 GitHub Repositories, Frameworks & Templates in 2025 | dev.to | 2025-06-03Main Repository: github.com/abpframework/abp
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Project mention: 15 Open-Source Projects to Replace Popular SaaS Tools & Apps 👨💻🔥 | dev.to | 2025-01-13
👩💻 GitHub link | ⭐ 9.7K stars | 💻 Website link
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This is fascinating. I was just playing around with this pretty printing library in .net and I wondered how security critical such a thing was, and whether or not it could be trusted.
https://spectreconsole.net/
Things like this make me a little more cautious about standard out in general! More research to do.
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practical-aspnetcore
Practical samples of ASP.NET Core 10 Preview 5, 9, 8.0, 7.0, 6.0, 5.0, 3.1, 2.2, and 2.1,projects you can use. Readme contains explanations on all projects.
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Hangfire
An easy way to perform background job processing in .NET and .NET Core applications. No Windows Service or separate process required
Project mention: The Hangfire Cookbook: A Practical Guide to Background Job Processing in .NET and Azure | dev.to | 2025-03-16Hangfire is one of the most powerful background job processing libraries in the .NET ecosystem. Whether you're working with ASP.NET Core, .NET Framework, or integrating with Azure Services, Hangfire simplifies job scheduling, execution, and monitoring.
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Refit
The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.
I really love using Refit library for communication with other services via HTTP protocol. This library provides an interface wrapper (with code generation) that wraps HttpClient using HttpClientFactory.
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awesome-blazor
Resources for Blazor, a .NET web framework using C#/Razor and HTML that runs in the browser with WebAssembly.
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Orchard Core
Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of that framework.
enhanced speed of a solution load; dropped cache size by nearly 50% and accelerated loading by 10% (they used OrhcardCore as an example to measure it);
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Electron.NET
:electron: Build cross platform desktop apps with ASP.NET Core (Razor Pages, MVC, Blazor).
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.NET 9 will absolutely load a library that was built targeting .NET 5.
For instance, GraphQL was built targeting both .NET 5 and .NET Standard 2.0, as you can see towards the top of the NuGet page: https://www.nuget.org/packages/GraphQL
.NET 9 will use the .NET 5 build, not .NET Standard 2.0. (.NET Framework 4.8.x would use .NET Standard 2.0.) Because .NET 5 > .NET Standard 2.0.
Or Automapper 14 targets only .NET 8: https://www.nuget.org/packages/AutoMapper
It runs on .NET 9 and .NET 10.
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Hot Chocolate
Welcome to the home of the Hot Chocolate GraphQL server for .NET, the Strawberry Shake GraphQL client for .NET and Nitro the awesome Monaco based GraphQL IDE.
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Umbraco
Umbraco is a free and open source .NET content management system helping you deliver delightful digital experiences.
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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).
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A note from our sponsor - SaaSHub
www.saashub.com | 19 Jun 2025
Index
What are some of the best open-source dotnet-core projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | core | 21,432 |
| 2 | awesome-dotnet-core | 20,538 |
| 3 | AspNetCore-Developer-Roadmap | 19,213 |
| 4 | Bitwarden | 16,657 |
| 5 | amplication | 15,692 |
| 6 | Entity Framework | 14,174 |
| 7 | ABP | 13,551 |
| 8 | notesnook | 12,072 |
| 9 | ASP.NET Boilerplate | 11,928 |
| 10 | spectre.console | 10,323 |
| 11 | practical-aspnetcore | 9,976 |
| 12 | Hangfire | 9,720 |
| 13 | nopCommerce | 9,655 |
| 14 | Refit | 9,093 |
| 15 | awesome-blazor | 9,091 |
| 16 | imewlconverter | 8,646 |
| 17 | Ocelot | 8,556 |
| 18 | Orchard Core | 7,734 |
| 19 | Electron.NET | 7,469 |
| 20 | .NET-Backend-Developer-Roadmap | 6,722 |
| 21 | GraphQL for .NET | 5,936 |
| 22 | Hot Chocolate | 5,496 |
| 23 | Umbraco | 4,861 |
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