FreeBowden dual/quad extrusion extruder (single-nozzle single-drive) + video
Thingiverse
12 model
Free
FreeUniversal Quad-Rail
Thingiverse
FreeMini quad copter Spidex Micro By Quaternium
Thingiverse
FreeToucan Quad Spool Holder for Creality Cr10 Ender 3 Etc
Thingiverse
FreeHubsan Quad Props (7mm + 8.5mm Motors)
Thingiverse
FreeSpider robot(quad robot, quadruped)-MG90
Thingiverse
FreeEnder 3 S1 quad Z-brace mod
Thingiverse
Freestar lord quad blasters
Thingiverse
FreeMicro DUAL/QUAD Extruder
Thingiverse
FreeEyebreaker Micro Quad
Thingiverse
FreeBigFoot 10" loooong range Quad (FOR FREE)
Thingiverse
FreePackout Bits 'n Pieces Quad Tray for Compact Organiser
Thingiverse