Reddit user /u/mz4250 has made files that’ll enable you to 3D print most of the D&D monsters. That’s not all; he’s made them available for for free.
You can download them here.
At the same time, user /u/sasuke_so_cool, ramped up his own campaign by designing and 3d printing his own dungeon elements.
Want those for free? No problem; they’re available to download for free from Thingiverse.
Hat tip to Geek Girl Diva for the spot