Dragula might be a bit more popular than FilePane. We know about 1 link to it since March 2021 and only 1 link to FilePane. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I use FilePane. You just drag the files and a "drop here" pane appears. You can do many things with it and one of them is to convert to .jpg and you can even choose the amount of compression. Source: about 3 years ago
I used Dragula[^1] for a form builder in the past and had quit a pleasent experience. Though I don't know how it would hold with a drag centric (card game) UI [1]: https://bevacqua.github.io/dragula/. - Source: Hacker News / over 2 years ago
Yoink - Yoink is a website that makes it easier to drag and drop images and text from one screen to another. It's a straightforward site with help along the way if you aren't sure about dragging and how to place your content.
Pixi.js - Fast lightweight 2D library that works across all devices
Dropover - Mac app for easier drag & drop
Substance - A JavaScript library for web-based content editing
Dropzone - If you want your file uploads to work even without JavaScript, you can include an element with the class fallback that dropzone will remove if the browser is supported.
Anime.js - Lightweight JavaScript animation library