Hydra vs Lively Wallpaper

Hydra is a continuous integration service for projects based on Nix. It checks out project source periodically or continuously, builds it, runs tests, and produces reports. Work is organized into jobsets whose inputs can trigger builds when they change; jobsets can also depend on one another. Flake jobsets are supported when their outputs expose a hydraJobs attribute set. Jobs can produce packages, ISO images, or tarballs, and jobset inputs can use Git checkout sources. Hydra also provides a JSON API. It is aimed at Nix and NixOS package developers, not people who only need to use NixOS. Hydra is open source under GPL-3.0 and listed at free. It is self-hosted, with no hosted option listed, and running it is currently supported only on NixOS; the repository recommends the NixOS module for production. Flake evaluation is restricted from accessing files outside the Nix store. Some state is stored in the database, so backups are needed, and the wiki reports that hydra-queue-runner can sometimes leave queued builds unscheduled.

Lively Wallpaper is a free, open-source animated wallpaper application for Windows. It supports video and GIF wallpapers through mpv or VLC, with filters and hardware acceleration, and can load HTML files or web addresses running WebGL and JavaScript. Other wallpaper sources include GLSL shaders, Shadertoy URLs, video streams, and Unity or Godot games; GUI application support is limited. Wallpapers can span or duplicate across any number of monitors, including HiDPI and ultrawide displays, and any wallpaper can be used as a Windows screensaver. Command-line arguments and third-party scripting software such as AutoHotkey provide control options. Playback pauses when fullscreen applications or games run, reaching approximately 0% CPU and GPU usage. Lively says it does not collect, store or share personal information, while operational window and process data remains local. The listed plan is free and requires Windows 10 version 1903 or above with a 64-bit installer. Only the latest release receives security patches, and vulnerabilities can be reported by email.