FreeMedusaHC V0.2 – Budget Hotend Toolchanger
Printables
8 model
Free
FreeMulti Use - Ender 3 Extruder Mount for 20mm extrusion
Thingiverse
FreeMulti-extruder derived from the Prusa Multi Material 2 upgrade.
Thingiverse
FreeMulti-Color Custom Upgraded BMG Extruder
Printables
FreeMMX Multi-Material Extruder – Exclusive Final Release
Printables
FreeEnder 3 CR10S Multi Direct Drive Extruder with Tool Free Adjustment
Thingiverse
Freehighly integrated BMG / E3D v6 extruder mount - multi-platform - CAD-files included
Thingiverse
FreeHE3D prusa i3 dual hotend mount
Printables