OpenScreen is an open-source alternative to Screen Studio (github.com)

OpenScreen is a free, open-source screen recording and demo-making app on GitHub, positioned as a simpler alternative to Screen Studio with no subscription and no watermarks. It supports recording full screens or specific windows, zoom and annotation tools, cropping/trim, background customization, and export in multiple resolutions and aspect ratios. The project is labeled beta, with some limitations around system audio capture depending on macOS/Linux setup, and is licensed under MIT.