I used to use it as well. Back in Windows 9x days I used to use GetRight. Now I use JDownloader.

For me it’s MusicBee on desktop and Aimp on Android.

You can extract aspect from legendary items and they will be stored in Consumables tab in your inventory. Doing this destroys the item. From there you can imprint it on a other item when needed but you won’t be able to extract it again. I haven’t tried imprint new apsect on another legendary item yet. If it’s possible I would assume it would overwrite the existing one. So you’d lose it.

I also use Helltides website for mystery chests and mapgenie for the rest.Link to Diablo 4 Mapgenie.