gPodder is a podcast client for Linux systems as well as Windows and MacOS.
FocusWriter is a simple and open-source distraction free fullscreen word processor for Linux Desktops.
mpv – the best, free and open source media player for Linux systems, recently releases version 0.20.0 which is a maintenance release. This release contains lots of bug fixes and minor enhancements.
Lyx is a WYSIWYM document processor with great features.
A quick tip on how to change the default toolbar look in LibreOffice.