Mac OS X Softwares to Skinnable

MPlayer OSX Extended is a lightweight and versatile video player for macOS, built upon the robust MPlayer engine. It offers excellent format compatibility, subtitle support, and a clean interface for a focused playback experience.

Nightingale is a highly customizable cross-platform audio player with a focus on extensibility, featuring a beautiful interface, a wide array of supported formats, and tools like media library management, podcast playback, and integrated web browsing.

Nox App Player is a powerful and free Android emulator designed for optimal performance when running Android games and applications on Windows PCs. It provides a robust environment with extensive customization options for developers and gamers alike.

KMPlayer, also known as K-Multimedia Player, is a versatile media player for Windows, Android, and iOS. It supports a vast array of audio and video formats, offering a comprehensive playback experience with advanced features and customization options.

Launchy is a discontinued yet highly efficient open-source keystroke application launcher for Windows, macOS, and Linux. It allows users to quickly open programs, documents, and perform searches by typing their names, significantly speeding up workflow.

Winamp is a versatile media player known for its extensive format support, customizable interface, and robust library management. It provides a classic yet powerful platform for enjoying music, videos, and online content, with features like internet radio streaming, podcasting, and various synchronization options.