"Beige Stone", Seamless Web Texture #1031
Stone CC BY-SA 3.0It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
More Textures
Prismatic Abstract Geometric Background 4 No Black #441
Dark CC 0Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Page ornament 21 #2361
Dark CC 0From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
blocky filter pack 2 #158
Noise CC 0Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH
Prismatic Polka Dots Mark II 3 No Background@2X #535
Noise CC 0Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Farmer #659
Fabric CC BY-SA 3.0Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Background pattern 215 (colour 2) #2370
Blue CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Background pattern 302 (colour 2) #1893
Dark CC 0The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Prismatic Isometric Cube Extra Pattern No Background@2X #789
Light CC 0Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Congruent Pentagon #1307
Unknow CC BY-SA 3.0Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
Background pattern 246 (colour 2) #2185
Green CC 0This was formed by distorting an image of a background on Pixabay.
Source Firkin
Tree and bird pattern #1982
Green CC 0From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Decorative divider 187 #2522
Dark CC 0From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Background pattern 259 (colour 6) #2097
Blue CC 0Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Overlapped wood #2567
Wood CC 0A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Colorful Floral Pattern Background 3-remix #215
Noise CC 0This is the remix of "Colorful Floral Pattern Background 3" uploaded by "GDJ". Thanks.
Source Yamachem
Background pattern 245 #2192
Green CC 0This was formed by distorting an image of a background on Pixabay.
Source Firkin
Decorative divider 242 #2083
Dark CC 0From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Classy Fabric@2X #612
Dark CC BY-SA 3.0This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Grid #974
Gray CC BY-SA 3.0There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Background pattern #1942
Brown CC 0Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Pinetree in tortoiseshell(亀甲松) #2538
Dark CC 0The image depicts a seamless pattern of Japanese Edo pattern called "kikkou-matsu" or "亀甲松" meaning " tortoiseshell-pinetree".The real pinetree is like this: https://jp.pinterest.com/pin/500744052301065077/
Source Yamachem
"Wide Stripe Wallpaper", Seamless Pattern #1227
Yellow CC BY-SA 3.0A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
Seamless Prismatic Pythagorean Line Art Pattern No Background@2X #570
Light CC 0Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ