Background pattern 215 #2371
Brown CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
More Textures
Tessellation 15 (colour 3) #2220
Red CC 0The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Soft Kill@2X #319
Dark CC BY-SA 3.0Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Stripey ball pattern #1997
Yellow CC 0To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Blue & Dark Well #1703
Wall CC 0Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Scribble Light #739
Paper CC BY-SA 3.0A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Maze-seamless pattern #2555
Grid CC 0This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
Prismatic Curved Diamond Pattern 7 No Background@2X #548
Noise CC 0Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
Decorative divider 217 #2233
Dark CC 0Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
P5@2X #1114
Light CC BY-SA 3.0Number five from the same submitter, makes my job easy.
Source Dima Shiper
Stardust #1209
Dark CC BY-SA 3.0Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
P2@2X #1108
Light CC BY-SA 3.0A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Background pattern 334 (colour) #1730
Red CC 0Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Weave #733
Wall CC BY-SA 3.0Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Orange-red Pattern #995
Stripes CC BY-SA 3.0Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
Background pattern 272 #2057
Brown CC 0A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Background Patterns Lazuli #253
Fabric CC 0If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Overlapping planks 6 #2570
Wood CC 0A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Indian Red Web Background #1172
Concrete CC BY-SA 3.0A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
blue wave-seigaiha #2535
Blue CC 0The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
Green Wall #1268
Wall CC 0Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso