Facebook Messenger

Easily accessible with the help of almost any modern web browser, Messenger.com is Facebook's official web app that offers users a clutter and distraction-free chat environment, just like in the case of its mobile counterpart.
Facebook Messenger is a smooth-running.NET wrapper for the Messenger.com web-app that basically brings all its functionality from the web browser directly onto your computer's desktop.
Right off the bat, it must be pointed out that unlike many other similar wrappers for the popular web app, this one has one major benefit: it offers far better system integration.

Integrates itself nicely with Windows 10, even without installation

It does not require installation, simply unzip its package and swiftly launch it via its designated executable files.
This said, once started, the application unobtrusively integrates itself with your computer's taskbar and, once your start using it a bit, you will soon notice its native system notifications that look right at home on Windows 10.

Brings the Messenger.com web app to your computer's desktop without compromising its functionality

Other than that, it's business as usual, as there are no major differences between using Messenger.com from your browser or directly with the help of this wrapper.
You get full access to all the chat functions, send stickers or emoji, you can make audio and video calls, record voice messages, and even send files.

An unofficial wrapper for Messenger.com, specially designed for Windows 10

Overall, the wrapper performed better than expected, the only small nuisance we have encountered during our tests was that, at times, when we reduced the main window to small sizes, some chunks of text from the chat areas were not appropriately displayed.
To conclude, if you want a convenient way to chat with your friends via Facebook without having to use a web browser and you are running Windows 10, then this wrapper might just be the best solution for this particular situation.