Open Source .NET Software & Tools

Discover the best open source software and alternatives built with .NET. Explore top tools, compare features, and find the right solution.

Noctis

Cross-platform lossless music player with rich library management, synced lyrics, and gapless playback for Windows, macOS, and Linux.

Alternative to:

Spotify

FerrumPix

Desktop photo manager and image editor for Linux, Windows, and macOS with RAW development, batch processing, and Immich/Nextcloud integration.

Alternative to:

Google Photos

AI-assisted

OpenRA

Open source game engine that reimplements early Westwood classics including Command & Conquer: Red Alert, Tiberian Dawn, and Dune 2000.

Alternative to:

Command & Conquer

Kavita

Self-hosted, cross-platform reading server for manga, comics, and ebooks with responsive web readers and an OPDS feed.

Alternative to:

Ubooquity

PixiEditor

PixiEditor is a universal open-source 2D editor for pixel art, painting, vector graphics, and animation. Powerful tools wrapped in a modern, friendly interface for every creator.

Alternative to:

Adobe Photoshop

Flink

A zero-config, FOSS URL shortener with QR code generation and OpenTelemetry support, built in ASP.NET Core.

Alternative to:

Bitly