Editors' Note: This unregistered version displays a nag screen at startup. Registration costs $20.
Kaleidoscope is a powerful utility that gives your Macintosh a complete visual overhaul, letting you choose from thousands of different interface designs, using plug-in files called schemes. Kaleidoscope patches nearly all of the Macintosh interface, including the basic windows, scroll bars, menus, and buttons under System 7, as well as the popup windows, tabs, beveled buttons, and sliders in Mac OS 8.
Kaleidoscope 2.0 (known as K2) was a huge step forward in interface customization. In addition to running old Kaleidoscope schemes faster, more reliably, and with less RAM, version 2.0 offered non-rectangular windows, enhanced menus, background patterns, double-headed scrollbars, tabs, sliders, cursors, and many other enhancements.
In version 2.3, Kaleidoscope offered enhanced menu effects (in schemes that support them), including transparency and extended borders with eight-bit masks. For transparent menus in other schemes, you must use Power Windows. This version fixes many bugs and adds better compatability with other programs. To view all changes, click here.