FreeHexaFlexon for smaller Printers such as MP Select Mini
Thingiverse
10 model
Free
FreeFilament guide for passing through a material (such as wood)
Thingiverse
FreeStorage tower for small things such as marbles
Thingiverse
FreeSimplified & Enhanced Air Scrubber for 3M Filter such as for MakerBot Replicator 2X
Thingiverse
FreeCarbon filter housing for 3 inch ducting (such as snapmaker enclosure)
Thingiverse
Free10,5cm 105mm/45 MPL SK naval gun german cruisers in WWI such as Emden, Kolberg and Undine
Thingiverse
FreeCHAIN GUARD (COVER), PROWHEEL 52T, such as Bicycle Author Simplex.
Thingiverse
Free"Gunnozzle" 3D printer extrusion fan nozzle for V6 J-head type with square heat sink and 30mmfan (print cooler) such as Tevo Tarantula . design with built in scaffold
Thingiverse
FreePrusa MK2 Trash Bin for Purge Lines and such
Thingiverse
Free1.6 mm z axis stop spacer CTC, Replicator, Creator and such
Thingiverse