Ambient is a MUI-based desktop environment for MorphOS that is meant to be simple and fast. Its features include:

fully asynchronous, multi-threaded design

does not use icon.library

built-in old style icons support, automatic remapping

built-in newicon support

built-in "OS" 3.5 Glowicons support

new true-color versatile icon format (Ambient PNGicon)

file notification

direct true-color rendering (no pen allocations)

support for deficons (devices)

64-bit arithmetic to handle big storage devices

localized

fast file I/O functions

ARexx port (optional)

built-in disk formatting

built-in commodities manager

support for appwindows/appicons

visual effects: transparency, blurring, color imposing, alpha channels...

built-in wbstart.library

panels