Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.
Dotnet Core GitHub Repositories (2026) · Open Source Tools
Discover the best Dotnet Core open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.
PixiEditor is a Universal Editor for all your 2D needs
A .NET library for making bots using the Discord API.
A .NET library for rendering PDF files as images.
Abstraction layer over YouTube's internal API
DacFx, SqlPackage, and other SQL development libraries enable declarative database development and database portability across SQL versions and environments. Share feedback here on dacpacs, bacpacs, and SQL projects.
Cross platform .NET bindings for Vulkan, VMA, SPIRV-Cross and shaderc
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.
A production-ready data access platform for .NET applications.
A .NET source generator for generating object mappings. No runtime reflection.
PerfView is a CPU and memory performance-analysis tool
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
A fully open source & end-to-end encrypted note taking alternative to Evernote.
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.
ASP.NET Boilerplate - Web Application Framework
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.
GraphQL for .NET
Library for interacting with command-line interfaces
A modular, extensible 2D game framework for .NET.
Open source, cross-platform, user-mode tablet driver