Feather UI

Feather is a universal UI library that only mutates application state in response to user inputs or events, using functional reactive event streams, and maps application state to a layout using persistent functions, which then efficiently render only the parts of the UI that changed using either a standard GPU compositor or custom shaders.

Building

Feather is a standard rust project, simply run cargo build on your platform of choice. A NixOS flake is included that provides a develop environment for nix developers who do not have rust installed system-wide.

Running

Examples can be found in feather-ui/examples, and can be run via cargo run --example [example_name].

If you are on NixOS, use nix run github:Fundament-Software/feathergui#[example_name] If you are not on nixos but have nix, use nix run --impure github:nix-community/nixGL -- nix run github:fundament-software/feathergui#[example_name]

The examples have currently only been tested on NixOS and Windows 11, but should work on most systems.

Funding

This project is funded through NGI Zero Core, a fund established by NLnet with financial support from the European Commission's Next Generation Internet program. Learn more at the NLnet project page.

License

Copyright © 2025 Fundament Software SPC

Distributed under the Apache License, Version 2.0.

SPDX-License-Identifier: Apache-2.0