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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I'm not sure exactly what you mean by "drag & drop" but awesome wm can be set up to rearrange windows by dragging them with the mouse. In fact, I find it easier than stacking window managers, because if I hold down the windows key, I can click anywhere on the window to drag it, I don't have to have a title bar taking up space.
You can install instantWM on another distro. I myself wrote MoonWM, which is based on dwm and should support basic DE functionality as well as draging windows with you mouse. If you want to you can give it a try. Although I should also not that it is not as smooth of an experience, as many regular DEs and I don't plan an pushing any updates other than obvious bugfixes in the near future.