FreeTim's Test Train (calibration and test models to help reduce plastic waste)
Thingiverse
15 model
Free
FreeReduce vibration da vinci 1.0
Thingiverse
FreeAnet A8 Brackets to Reduce X-Axis Motion
Thingiverse
FreeZ AXIS Stabilizer(reduce wobbling)
Thingiverse
Free3D filament inset to reduce 30mm (Hatchbox) spool opening to 8mm rod (Rigidbot spool holder)
Thingiverse
FreeUniversal reducer nema17
Thingiverse
FreeBacklash Reducer for Delta printer 6 mm rod
Thingiverse
FreeDust collection magnetic reducer flange 4" to 63.5 mm
Thingiverse
FreeMakerbot Mini Idler - reduces noise
Thingiverse
FreeTin Can Phone Port Reducer
Thingiverse
FreeEnder 3 Micro sd card hole reducer
Thingiverse
FreeCustomizable Fan to Duct Adapter Reducer/Expander Exhaust Shroud
Thingiverse
Free120mm Fan to 3in Duct Reducer
Thingiverse
FreeFlashforge 5M Pro Fan Noise Reducer
Thingiverse
Free5th Generation Replicator - Filament feed system for reduced feeding resistance
Thingiverse