Inflicted@2X #118
Grid CC BY-SA 3.0Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
More Textures
Leafy pattern 11 (colour) #1763
Green CC 0From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Seamless Cardboard Texture #1212
Cardboard CC BY-SA 3.0A free background image with a seamless texture of cardboard. This texture of cardboard looks quite realistic, especially when is actually tiled.
Source V. Hartikainen
Prismatic Snowflakes Pattern 3 No Background #413
Light CC 0Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Lichen #1293
Stone CC 0Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
Redox 02@2X #852
Light CC BY-SA 3.0After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Seed #1289
Wall CC 0Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Connected@2X #349
Light CC BY-SA 3.0White circles connecting on a light gray background.
Source Mark Collins
Circles@2X #186
Light CC BY-SA 3.0One more sharp little tile for you. Subtle circles this time.
Source Blunia
Knitted Sweater@2X #1098
Light CC BY-SA 3.0Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Background pattern 306 (colour 6) #1878
Colorful CC 0Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Seamless Wood Pattern #889
Wood CC BY-SA 3.0A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Configurable Graph Paper@2X #816
Stripes CC 0Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Transparent Square Tiles #298
Grid CC BY-SA 3.0The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
Binding Light@2X #1137
Light CC BY-SA 3.0Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Joined spirals pattern #2482
Yellow CC 0The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
Rough Cloth@2X #313
Fabric CC BY-SA 3.0More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
Aged Grid Paper Background #1072
Paper CC BY-SA 3.0A seamless web background with texture of aged grid paper.
Source V. Hartikainen