TranslucentTB

TranslucentTB is a lightweight and straightforward piece of software that allows you to customize the look of your Windows 10 computer's taskbar with the help of a set of stylish transparency and translucency effects.

No installation, no user interface, just a small menu and an even smaller tray icon

To start off with, we will point out that this little app does not require any type of installation. To start taking advantage of what it can offer, simply download it, unzip its package and run it from its default executable, just like any other app.
Once launched, TranslucentTB smoothly integrates with the taskbar and makes its presence noticed via a tiny icon. This is a good time to point out that that the application does not feature a user interface per se. However, it does feature an ultra-minimalist taskbar menu that allows you to provide your computer's taskbar with either full transparency or with a blur effect.

Transparent, translucent or colored taskbar, with just a few mouse clicks

By reading the provided usage.md file, you will find out that these are not all the features this app provides. In fact, you can modify its behavior and apply various colors to your computer's taskbar with a bit of basic command line knowledge.
If you want things to go back to normal, simply close the tiny app from its taskbar menu and then activate the Start menu and that's that. It is also worth mentioning that TranslucentTB comes with support for multiple monitors. Unfortunately, there's still one issue that should be addressed, specifically, the effects do not apply to the Cortana search box.

One of the smallest apps, responsible for one of the biggest visual changes to your computer's OS

All in all, TransluecentTB is a somewhat charismatic application since it allows you to change the (pragmatic) appearance of the most iconic and important UI components of Windows. Having said that, we wouldn't be too surprised if it would quickly pick up quite a bit of following in the period to come.
Since the app was even more simplistic when it was first presented in a Reddit post by the developer, it would be very interesting to see how it evolves from here onward. Options and toggles for accurately customizing the translucency percentage, a color-picker and a launch-at-system-startup feature are just some of the possible improvements that would make this little app even more desirable that it already is.