Luminodot by Bandai, 2008. A 70×50 grid with pegs. Also see the Lite-Brite.
Computergraphic by Béla Julesz, 1965. Probably made for the first exhibition of computer graphics in USA, Computer-Generated Pictures (1965), together with A. Michael Noll (both working at Bell Labs at the time).
Appearance Of Crosses by Ding Li
Continual painting series by Shanghai artist creates abstract colourful grids using the cross as his motif mark unit. He has been making these paintings for 20 years and is considered one of the most important abstract artists working in China today.
More can be discovered at ShangART Gallery website here
EDIT 2024: It seems like Ding Yi is the preferred romanization of the name.
Assisi embroidery, based on an ancient Italian tradition where the background is filled with embroidery stitches and the main motifs are left void i.e. unstitched.