O3D Modular Drawers 2.0 - no watermark
I really liked this design, but the original file had a link to the author's website inlaid into the bottom of the piece, and his logo cut into one of the inside walls. This increased filesize and print time by non-negligible amounts, and left overhangs/retractions that increased print risk.
This file is the exact same as the original, just with the fluff removed. It prints about 3% faster, the STL filesize is about 15% smaller, and prints are more reliable due to zero overhangs/retractions.
I use the alternate knob for simpler and safer printing, as well; https://www.thingiverse.com/thing:2810855