Last week I published a small open-source library on GitHub around an overlooked, 10 year old, capability of the browser's built-in Drag and Drop and ClipboardEvents. It will let your users transfer data to other web (and native!) applications on the desktop, by using the primary drag and copy interactions.
This could be particularly interesting for folks who are creating progressive web applications (PWA) and want to integrate with third-party apps, or need to interaction across browser-windows. Think about it as sharing on desktop.
Curious to hear what possible use-cases could be for your work!