In Mac, there is the Smart Folder that allows you to sort and organize your files and folders. In KDE, there is the Magic Folder that can do the same thing.
Magic Folder is a plasmoid for KDE that enables you to organize your files effortlessly. All you need to do is to drag and drop the file(s) onto the Magic Folder and it will move them to the destination you have pre-defined. There is no limitation to the type of file that it supports. You just set the rules and it will work magically.
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For anyone who wants to sell their products online, the best way out is to setup an e-commerce site and shopping cart where your visitors can shop and buy. However, the best way doesn’t necessary mean it is the easiest way. Most of the e-commerce sites require plenty of work to setup and some even require you to have extensive coding skill.
If you have not heard, 
While there are exceptions, power management is primarily the concern of laptop, netbook, and tablet users, and as the world becomes increasingly reliant on these mobile devices, getting good battery life and conserving energy are top priorities.
As with most tasks in Linux, there are multiple ways to handle removable devices, but for removable media in particular, KDE’s primary tool is the Plasma Device Notifier Widget. It is activated by default on the KDE panel in all 4.x versions of the desktop environment. From it, you can manage all sorts of removable media, including hard drives, SD cards, USB flash drives, CDs, DVDs, cameras, and music players.
One of the remarkable features of KDE 4 is the extensibility. Developers or even regular users can contribute to the rich collection of artwork, software, widgets, and visual improvements. Ever so often, I look around for rather random add-ons that make my desktop experience more pleasant or occasionally even serve a meaningful purpose. They range from full applications to very basic widgets.