The concept of addons is an interesting one. At some point over the past decade or two, companies developing (successful) software realized that bundling an ever-growing code base into their products in order to meet the spiraling tower of requests from their users would result in unsustainable bloat and complexity that would not warrant the new functionality. And so, the idea of addons was born.

Addons come in many flavors – extensions, plugins, applets, scripts, and of course, widgets. A large number of popular programs have incorporated them, and when done with style, the extra functionality becomes as important as the core application itself. Examples that come to mind: Firefox, Notepad++, VLC, Blender. And then, there’s the Plasma desktop environment. Since inception, KDE has prided itself on offering complete solutions, and the last incarnation of its UI framework is no different. Which begs the question, what, how and why would anyone need Plasma widgets? We explore.