Widget Web - Widget Web is a handy application that allows you to view the content of web pages in a widget on your iOS device’s home screen.
EarTrumpet - Volume Control for Windows
Widgeridoo - Custom and pre-made widgets for iOS and macOS
Sound Control - App-specific volume control
Pixel Widgets - Pixel Widgets is a feature-rich application that makes it easy for you to add custom retro widgets and select from pre-loaded widget design or create a custom one with more than 150 fonts and color themes at your disposal.
Power mixer - Power Mixer is a complete Windows volume control replacement.