Background pattern 227 #2314
Yellow CC 0A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
More Textures
Light Grey Floral Motif #344
Wall CC BY-SA 3.0Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Diamond pattern 2 (colour 4) #2265
Red CC 0From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
crissXcross@2X #112
Dark CC BY-SA 3.0Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Leafy pattern 12 (colour) #1762
Red CC 0From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Black Linen 2 #103
Dark CC BY-SA 3.0A new take on the black linen pattern. Softer this time.
Source Atle Mo
Background pattern 336 (colour 2) #1720
Green CC 0Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Floral divider 4 #1750
Dark CC 0From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Leafy pattern 10 #1775
Dark CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Cross pattern (negative) #2332
Dark CC 0A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
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
Glassy Orange Pattern #1315
Orange CC BY-SA 3.0This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
Grass #1286
Unknow CC 0Zero CC tileable dry grass texture, photographed and made by me. CC0
Source Sojan Janso
Carpet seamless texture 3 #2553
Wall CC 0From an image on opengameart.org shared by rubberduck.
Source Firkin
fawn spot pattern #2472
Dark CC 0The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
Prismatic Groovy Concentric Background No Black@2X #452
Noise CC 0Prismatic Groovy Concentric Background No Black
Source GDJ
Decorative divider 184 #2589
Dark CC 0From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Prismatic Snowflakes Pattern 3 No Background@2X #781
Light CC 0Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Decorative divider 245 #2079
Dark CC 0From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
P5@2X #1114
Light CC BY-SA 3.0Number five from the same submitter, makes my job easy.
Source Dima Shiper
Photography@2X #1305
Unknow CC BY-SA 3.0Neat little photography icon pattern.
Source Hossam Elbialy
Background pattern 215 (colour 4) #2368
Green CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin