APIDog is an alternative to Postman that gives all the features of the paid version at a fraction of cost.APIDog is easy to migrate from Postman and has a GUI that is comprehensive, elegant, and user-friendly.MPV is a command line-based media player that can handle a wide range of video and audio formats.Kodi is a comprehensive media center for playing and organizing media from local and network storage media.PotPlayer is a freeware media player that is not traditionally open-source but offers extensive features and customizations.SMPlayer is a cross-platform media player built on the MPlayer engine and has a user-friendly interface.Audacious is a lightweight audio player with robust support for numerous audio formats.Bomi is a multimedia player that provides a straightforward and elegant interface and supports many file formats.FreeTube is an open-source YouTube client that prioritizes user privacy by eliminating tracking cookies and ads.Exploring open-source alternatives like these can lead to enhanced customization, privacy, and performance tailored to individual preferences.