Apps with 'Media library' feature
Kodi, formerly XBMC, is a free and open source media player and entertainment center for Linux, Mac OS X, Windows, XBox, and iOS.
Comprehensive photo management software for viewing, batch converting, editing and resizing images and creating thumbnail sheets.
Media center allowing to watch movies, series, YouTube channels instantly. You can watch in HD, with subtitles, and easily cast any file to TV through DLNA, Chromecast, AppleTV!
Stremio also gives you notifications for new episodes / movies.
A extensible Music player with Podcast support, web radio, playlists and many more. As it is written in Python, writing new plug-ins is really easy.
Sonarr (formerly NzbDrone) is a PVR for Usenet and BitTorrent users.
Eagle helps you manage pictures, screenshots, user interfaces and designs that make your lightbulb shine. If you are a designer, you will definitely love this!.
Wikimedia Commons is a media file repository making available public domain and freely-licensed educational media content (images, sound and video clips) to everyone, in their own language.
OpenPHT is a community driven fork of Plex Home Theater.
Enable anyone to create animated videos and other multimedia content without expertise or graphical talent, using a huge media library of over 500,000 royalty-free assets (stock videos, photos, illustrations, music and sounds).
CloudMe is a free and open service to sync, store and make all your files available in the cloud through an easy to use Blue Folder.
Zoom Player is a powerful, flexible and customizable DVD and media player for Windows.
LibreTime is a community driven fork of SourceFabric's Airtime. It helps you run a collaborative schedule oriented radio station with a web interface. It has been updated with new features and works with modern distros and PHP 7 and above.No screenshots yet
Phraseanet is a Digital Asset Management system (DAM for short) targeting the professionals needs. It’s created and maintained by the french company Alchemy.No screenshots yet
SickGear has proven the most reliable and stable TV fork of the great Sick-Beard to fully automate TV enjoyment with innovation.