Virtual Display Driver
Free · open source (MIT)
Add virtual monitors to Windows 10 and 11 that act and function like real displays — for streaming, recording, VR, Sunshine/Moonlight setups and headless machines. More than 10,000 stars on GitHub.

PyroSoft Software
Virtual display and audio drivers, Bourbon 26's compatibility data and more — with the code on GitHub. Each card says which licence applies.
Free · open source (MIT)
Add virtual monitors to Windows 10 and 11 that act and function like real displays — for streaming, recording, VR, Sunshine/Moonlight setups and headless machines. More than 10,000 stars on GitHub.

Free · open source (MIT)
Adds a virtual speaker and a virtual microphone to Windows 10 and 11 — for headless setups, remote desktop streaming, VR and audio testing without physical hardware.

Free for personal use · source on GitHub
A GTK3 app that adds virtual monitors to Linux (X11) at any resolution and refresh rate via xrandr, on AMD, Intel and NVIDIA. Licensed GPLv3 for personal and non-commercial use; commercial use needs a separate licence.

Free · open source (MIT)
The MIT-licensed half of Bourbon 26 anyone can reuse: Smart Play recipes, a mined fix catalog covering 528 Steam games (236 with a concrete Mac-safe fix), Apple Gaming Wiki and anti-cheat snapshots, a DXVK-macOS D3D9 patch, a fix for Steam's black window under Wine, and Direct3D 11 probes.

Python · no licence file
Python scripts for the Divoom Pixoo 64 LED display: stream your screen to it, send text messages and show screenshots. Pixoo 64 Snake adds the classic game, with difficulty levels and a live Tkinter preview.
JavaScript · GPL-3.0
Glassmorphism desktop widgets for Linux: weather, system stats, network, sticky notes, calendar and clock, each with its own accent colour, opacity and blur.
JavaScript · GPL-3.0
A cross-platform WYSIWYG Markdown editor built with Electron, with a full formatting toolbar, a raw Markdown view, live preview, HTML and PDF export, and dark mode.
Python · client GPL-3.0
Unlock hidden Windows features: a Windows 10/11 client that runs community scripts for debloating, privacy, performance and UI tweaks, backed by a public PowerShell script library.
C# · no licence file
A super-simple browser that makes any website transparent, so you can chat on top of a video.
C++ · non-commercial licence
A Windows-first archiver with a native C++ engine and a readable .dvz format, built for size-first compression.
Everything lives on GitHub at PyroSoftPro and VirtualDrivers. Looking for apps? See Mac, Windows, Linux and web.
Ferrum's public GitHub repository holds documentation only, with no releases yet; Ferrum itself is proprietary, not open source. Repos marked “no licence file” are public to read but don't include a licence.