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GUI Frameworks
AmigaOS spawned several GUI frameworks beyond the built-in GadTools/BOOPSI system. These frameworks provide layout management, user customization, and richer widget sets — features that the base Intuition API does not offer.
Framework Index
| File |
Framework |
Era |
Description |
| mui/ |
MUI (Magic User Interface) |
1993– |
De-facto standard. Architecture, developer guide, code examples |
| reaction.md |
ReAction / ClassAct |
1997– |
Hyperion's official OS 3.5+ GUI toolkit |
| bgui.md |
BGUI |
1994– |
Lightweight BOOPSI-based layout system |
Comparison
| Feature |
MUI |
ReAction |
BGUI |
GadTools |
| Layout engine |
✅ Constraint-based |
✅ Constraint-based |
✅ Basic |
❌ Manual |
| User preferences |
✅ Full |
⚠ Limited |
❌ None |
❌ None |
| Custom classes |
✅ MCC ecosystem |
✅ MakeClass |
✅ MakeClass |
❌ N/A |
| Availability |
Aminet (free runtime) |
OS 3.5+ bundled |
Aminet (free) |
ROM built-in |
| Platforms |
AmigaOS, MorphOS, AROS |
AmigaOS 3.5+ only |
AmigaOS 2.0+ |
AmigaOS 2.0+ |
| Adoption |
Very high |
Moderate |
Low |
Universal |