Dropover - Mac app for easier drag & drop

PyCharm - Python & Django IDE with intelligent code completion, on-the-fly error checking, quick-fixes, and much more...

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.

IntelliJ IDEA - Capable and Ergonomic IDE for JVM

Dockside (Open-Source) - Dockside is an open-source tool for provisioning lightweight access-controlled IDEs, staging environments and sandboxes - aka ‘devtainers’ - on local machines, on-premises (raw metal or VM) or in the cloud.

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.