Messenger for Desktop

Messenger for Desktop is a desktop client for Facebook chat that gives you access without having to open the social network on your browser, making chatting much more convenient.

This unofficial client, based on the web version provided at Messenger.com, gives you access to every feature with no restrictions: you can chat with contacts or groups; send pictures, videos, and stickers; and make video or voice calls. The application also includes a desktop notification system, which will show you tabs with any incoming messages, even if you have the program minimized.

Obviously, you must have a Facebook account to use this tool. It will also allow you to sync all the activity you have with your Facebook contacts on other platforms (be it Facebook chat on the website itself or the different mobile apps supported by the platform).