KCast is a KDE Plasma 6 widget that lets you cast video files or youtube URLs to a Chromecast devices in your local network. It supports device discovery, local media playback via an embedded HTTP server, and drag-and-drop integration with browsers and file managers like Dolphin.
sMovieDB is a free software which will keep your movie database clean and ordered on a quick simple way. Manage genres, categories, types of films, etc. Developed in Python+Qt with MySQL or SQLite database for KDE desktop http://smoviedb.sourceforge.net