1KnifeLemon / Filee
Free, open-source file converter. Convert 263 formats offline by drag & drop — images, PDF, Word, Excel, PowerPoint, HWP/HWPX, video, audio, e-books and archives. No upload, no Office needed.
Ranked by Attention Score: stars gained over the last 7 complete days
1–100 of 136 by Attention Score · Oct 27, 2026 – Nov 2, 2026 (UTC)
Free, open-source file converter. Convert 263 formats offline by drag & drop — images, PDF, Word, Excel, PowerPoint, HWP/HWPX, video, audio, e-books and archives. No upload, no Office needed.
The Free Software Media System - Server Backend & API
A modern file manager that helps users organize their files and folders.
ShareX is a free and open-source application that enables users to capture or record any area of their screen with a single keystroke. It also supports uploading images, text, and various file types to a wide range of destinations.
A free, open source C# framework for making games, or your own game engine. Direct access to native APIs and Vulkan, with the low-level libraries around them. The foundation under Kitten Space Agency and RimWorld's Waylith engine.
🛠「Watt Toolkit」是一个开源跨平台的多功能 Steam 工具箱。
Bitwarden infrastructure/backend (API, database, Docker, etc).
Free and open-source software that allows users to set animated desktop wallpapers and screensavers powered by WinUI 3.
Video game library manager with support for wide range of 3rd party libraries and game emulation support, providing one unified interface for your games.
🏞 A fast, open-source, modern image viewer for 90+ formats – including WEBP, GIF, SVG, AVIF, JXL, HEIC and more – built for smooth browsing across Windows, macOS, and Linux.
A Swiss Army knife for developers.
Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.
Kavita is a fast, feature rich, cross platform reading server. Built with the goal of being a full solution for all your reading needs. Setup your own server and share your reading collection with your friends and family.
Unofficial revival of the well known .NET debugger and assembly editor, dnSpy
LibVLC-based media player for the Universal Windows Platform
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI
An open-source IDE for C# and .NET, built with Avalonia, for Windows, macOS and Linux: a Roslyn-powered editor, its own debugger with Hot Reload, a CPU and memory profiler, XAML tooling for Avalonia and WPF, and an MCP server for coding agents.
PEASS - Privilege Escalation Awesome Scripts SUITE (with colors)
A customizable Windows desktop island for music, focus, live lyrics and your own AI companion.
One framework for creating powerful cross-platform games.
Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics
The main repository for the development of the evolution game Thrive.
A wrapper executable that can run any executable as a Windows service, in a permissive license.
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
Blazor Component Library based on Material Design principles. Do more with Blazor, utilizing CSS and keeping JavaScript to a bare minimum.
Provides an efficient allocation free async/await integration for Unity.
Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.
The high-speed OpenGL, OpenCL, OpenAL, OpenXR, GLFW, SDL, Vulkan, Assimp, WebGPU, and DirectX bindings library your mother warned you about.
Compile C# and .NET CIL to small standalone Wasm with WASI (AOT with built-in Runtime and Precise GC)
A rewrite of the old legacy software "depends.exe" in C# for Windows devs to troubleshoot dll load dependencies issues.
:honeybee: A collection of awesome .NET core libraries, tools, frameworks and software
A .NET library that makes it easier to create beautiful console applications.
A library for patching, replacing and decorating .NET and Mono methods during runtime
Automate SSL/TLS certificates on Windows with ease
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.
The official repo for the design of the C# programming language
Powerful .NET library for benchmarking
Cross Platform Terminal UI toolkit for .NET
MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker). The implementation is based on the documentation from http://mqtt.org/.
Simple GTK Paint Program
An alternative bootstrapper for Roblox with a bunch of extra features.
Microsoft Fluent UI Blazor components library. For use with ASP.NET Core Blazor applications
Enterprise-grade feature flag platform that you can self-host. Get started - free.
The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
The Workflow Engine for .NET
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.
FusionCache is an easy to use, fast and robust hybrid cache with advanced resiliency features.
Windows Calculator: A simple yet powerful calculator that ships with Windows
:bathtub: Clean Code concepts and tools adapted for .NET
A fast, powerful, CommonMark compliant, extensible Markdown processor for .NET
A .NET source generator for generating object mappings. No runtime reflection.
Math.NET Numerics
An unofficial .Net wrapper for the Discord API (https://discord.com/)
Telegram Client API (MTProto) library written 100% in C# and .NET
High-performance C# ECS
Lightweight embeddable web server written in pure C# with few dependencies to 3rd-party libraries.
Mono open source ECMA CLI, C# and .NET implementation.
:card_index: A simple fake data generator for C#, F#, and VB.NET. Based on and ported from the famed faker.js.
Static site generator for .NET API documentation.
Radzen Blazor is the most sophisticated free UI component library for Blazor, featuring 155+ native components including DataGrid, Scheduler, Charts, and advanced theming with full support for Material Design and Fluent UI. If Radzen Blazor is useful to you, a ⭐ on GitHub helps other Blazor developers find it.
.NET Community Toolkit is a collection of helpers and APIs that work for all .NET developers and are agnostic of any specific UI platform. The toolkit is maintained and published by Microsoft, and part of the .NET Foundation.
An implementation of StyleCop rules using the .NET Compiler Platform
A WebRTC, SIP and VoIP library for C# and .NET. Designed for real-time communications apps.
DotRecast - a C# port of Recast & Detour, Industry-standard navigation mesh toolset for .NET, Unity3D, games, servers
Umbraco is a free and open source .NET content management system helping you deliver delightful digital experiences.
Lightweight and fast library written in C# for reading Microsoft Excel files
.NET version of the Playwright testing and automation library.
A framework for building messaging apps with .NET and C#.
CSharpier is an opinionated code formatter for c#.
.NET for Apache® Spark™ makes Apache Spark™ easily accessible to .NET developers.
Next generation API for .NET
Open source, headless, multi-tenant eCommerce platform built with .NET Core, MongoDB, AWS DocumentDB, Azure CosmosDB, Vue.js.
One of the World's Fastest .NET CSV Parsers. Modern, minimal, fast, zero allocation, reading and writing of separated values (`csv`, `tsv` etc.). Cross-platform, trimmable and AOT/NativeAOT compatible with blazing fast SIMD vectorized parsing.
OpenBudgeteer is a budgeting app based on the Bucket Budgeting Principle
Fast and fully streamed Man-On-The-Middle to intercept, record, impersonate and alter HTTP/1.1, H2, websocket and gRPC traffic.
C# .NET 10 Blazor habit tracker application. Works on Web, Windows, Linux, Android, iOS and macOS.
NsDepCop is a static code analysis tool that enforces namespace and assembly dependency rules in C# projects.
A runtime library and schema code generation tools for Chrome DevTools Protocol support in C#/.NET.
Clean Architecture Solution Template: A proven Clean Architecture Template for ASP.NET Core 10
Entitas is a super fast Entity Component System (ECS) Framework specifically made for C# and Unity
A pure C# Open Source QR Code implementation
SuperSocket is a high-performance, extensible socket server application framework for .NET. It provides a robust architecture for building custom network communication applications with support for multiple protocols including TCP, UDP, and WebSocket.
ACID Document Database
The Official C# .NET Driver for MongoDB
Free open source office suite with business productivity tools: document and project management, CRM, mail aggregator.
Free Open Source Reporting tool for .NET6/.NET Core/.NET Framework that helps your application generate document-like reports
Headless CMS and Content Managment Hub
A production-ready data access platform for .NET applications.
A modular, scalable and ultra-fast open-source all-in-one eCommerce platform built on ASP.NET Core 10
Fast, cross-platform and reliable multipart downloader with asynchronous progress events for .NET applications.
Build all of your apps using what you already know and love ❤️
C#/.NET client library for the Binance.com cryptocurrency exchange REST and WebSocket APIs, supporting Spot and Futures trading and market data with strongly typed models.
Workflow Engine by Optimajet, the embeddable workflow engine for .NET and C#. Approvals, state machines and long-running processes with a visual Workflow Designer, BPMN import and six databases.
Box2D.NET - a C# port of Box2D, is a 2D physics engine for games, .NET, Unity3D, servers
A collection of over 140+ accessible, headless primitives and beautifully-designed components for Blazor built with shadcn/ui design principles.
A composable, cross-platform MVVM framework for .NET inspired by functional reactive programming. It moves mutable state out of the user interface, keeps each feature's logic in one readable place, and makes applications easier to test. Supports WPF, WinForms, WinUI, .NET MAUI, Avalonia, Uno Platform, Blazor and Android.
Roslynator is a set of code analysis tools for C#, powered by Roslyn.
A .NET library to run C# code in parallel on the GPU through DX12, D2D1, and dynamically generated HLSL compute and pixel shaders, with the goal of making GPU computing easy to use for all .NET developers! 🚀
FNA - Accuracy-focused XNA4 reimplementation for open platforms
Makes life working with units of measurement just a little bit better.