mpv is a free (as in freedom) media player for the command line. It supports a wide variety of media file formats, audio and video codecs, and subtitle types. mpv's focus is not on power-efficient playback on embedded or integrated GPUs (for example, hardware decoding is not even enabled by default). No GUI but it does have an on-screen controller.
Filestash lets you easily manage your data regardless of where it is stored: FTP / SFTP / Git / S3 / Minio / Dropbox / Google Drive
Graphical file manager. Lets you create mountable shared drives on a server for collaboration. Plugin architecture so it can be customized. Has its own text editor. Tries to run on as many platforms as possible, from desktop to mobile. Tries to be lightweight.
Rips mms:// streams to files on your hard drive.
A wiki dealing with television watching and recording using Linux and F/OSS software.
Open source media management and playback software to build your own set top box.
Video editor that specializes in adding special effects. Built using Electron. Add lightning, muzzle flashes, light sabers, and more.
Possibly the best collection of audiovisual CODECs for Win32 and Win64 out there. Widely reputed to have no malware or spyware hidden anywhere within.