I had some green PLA filament left, and I wanted to try to do something that would be challenging to print without any support. So, here's a little cactus (42mm high). Quite simple (and extremely useless) but interesting to print with no support whatsoever (you may even watch the timelapse video of the printing process ). It don't know if it qualifies as "art" but I think it's kind of decorative. :) Edit : I've also designed a support free printable little pot  that perfectly fits this cactus! ;) https://www.youtube.com/watch?v=vT59xlZmvrc https://pinshape.com/items/6445-3d-printed-cactus-pot
For you *cactus lovers* who enjoyed my support free cactus , here's the ultimate accessory : *the cactus pot!* It's precisely designed to welcome this cactus I made before, and keep it comfy in a simple and elegant environment. :) Be warned that's it's barely stable : I made a little hole so the cactus fits exactly, but a chock on the table or too much wind, and it might fall, so maybe a little bit of some non-permanent glue under the cactus' foot might secure it better. ;) And of course, as the cactus itself, the pot is very easy (and fast) to print, without any kind of support! PS : this is the file for the pot only! Click on the link above to get the cactus that belongs to it. ;) https://pinshape.com/items/6190-3d-printed-support-free-cactus
This is my 3D scanned cactus model that has been brought into Tinkercad.com, exported to Minecraft (as a .schematic file), then imported into a Minecraft world (using MCEdit), then exported out of Minecraft using Mineways and then 3D printed on a desktop printer.Minecraft Cactus  by johnbiehler  is licensed under the Creative Commons - Attribution  license. http://www.thingiverse.com/thing:718657 http://www.thingiverse.com/johnbiehler http://creativecommons.org/licenses/by/3.0/
I've been kind of obsessing over printing low poly models lately so figured I should convert my own model.Decimated down to 500 faces in Meshlab.This model was featured on Tested.com's Mystery Build Friday which is pretty cool:https://www.youtube.com/watch?v=W4kPt1HI_hg
Here is free 3D model of a cool 3D printable cactus. You can use it as a keychain or as a pendant. Download free STL file of this part and use your 3D printer to make this object. If you liked this 3D object, do not hesitate to post your photos on Cults or to comment in the comments section. The 3D file is 3D printable without any support and it is very easy to print since it is a simple extrusion of a 2D image.
This is my 3D scanned cactus model that has been brought into Tinkercad.com, exported to Minecraft (as a .schematic file), then imported into a Minecraft world (using MCEdit), then exported out of Minecraft using Mineways and then 3D printed on a desktop printer.