Messenger for desktop is a wrapper app to the official Facebook client messenger.com.
Handbrake, the free and open source video converter is capable of converting videos from modern file formats.
Scribus is free desktop publishing software that is available for Linux, Mac OS. Unlike other DTP softwares, Scribus comes with XML based file systems which can be read by any text editor. In case...
LibreOffice, the free office suite for Linux, Windows, might be coming with a tabbed Ribbon interface.
KDE Connect is designed to help to communicate multiple devices such as Desktops, Android smartphones, Tablets.
I-Nex is a tool providing all the device information in your Linux box.