metalheads_theme is a cursor theme created for X11 users who love rock music, providing a unique design for their mouse cursor.
For those who may not be familiar, X11 or X is a windowing system that provides windowing on bitmap displays. It is known for its flexibility, as it has been ported to many contemporary general purpose operating systems. X provides the framework for building GUI environments, including moving windows on the screen and interacting with a mouse and keyboard.
One advantage of X is that it doesn't mandate the user interface. Instead, individual client programs handle this aspect, resulting in a wide range of visual styles in X-based environments. X is not built into the operating system but is an additional application layer on top of the operating system kernel.
X was specifically designed to be used over network connections, unlike previous display protocols. It features network transparency, meaning that the machine where an application program runs can differ from the user's local machine. X originated at MIT in 1984 and the current protocol version, X11, appeared in September 1987.
The X.Org Foundation leads the X project, with the current reference implementation, X.org Server, available as free software under the MIT License and similar permissive licenses. If you're a fan of rock music and customization, metalheads_theme is an excellent choice for your mouse cursor theme.