2 layer board of 4.07x3.30 inches (103.28x83.77 mm).
Fixel Readout Board v4
2 layer board of 3.00x1.40 inches (76.20x35.59 mm).
2 layer board of 1.74x1.10 inches (44.15x27.94 mm).
Henry method 2-wire LCD interface. See Thomas Henry’s article in the February 2014 issue of Nuts and Volts. (This board design is released with the Author’s and Publisher’s permission.)
2 layer board of 2.31x2.56 inches (58.55x65.13 mm).
Using PTH parts and 3.5mm plug wired to board.
2 layer board of 0.97x2.46 inches (24.54x62.38 mm).
2 layer board of 5.00x2.99 inches (127.00x75.87 mm).
Board for 8x8x8 LED Cube
2 layer board of 1.34x1.58 inches (34.01x40.00 mm).
2 layer board of 1.00x1.35 inches (25.43x34.29 mm).
Add Radio, LED & Flash Mem to Arduino Uno
See my project on GitHub for details, latest versions and links to code
2 layer board of 1.67x1.57 inches (42.34x39.80 mm).
2 layer board of 1.65x1.41 inches (41.88x35.71 mm).
CDI rev C
2 layer board of 1.39x2.30 inches (35.26x58.42 mm).
Shared on March 1st, 2014 19:19.
All the info can be found here.
PCB Layout (to help build it) is here.