Background pattern 272 (colour 2) #2056
Pink 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
More Textures
Concrete Wall #77
Wall CC BY-SA 3.0Dark blue concrete wall with some small dust spots.
Source Atle Mo
Floral design 86 #1885
Dark CC 0From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
Abstract Tiled Background Extended 8 #519
Noise CC 0Abstract Tiled Background Extended 8
Source GDJ
Page ornament 29 #2307
Red CC 0From a drawing in 'Az Osztrák-Magyar Monarchia irásban és képben', 1885.
Source Firkin
Zodiac sign symbol background #1927
Red CC 0Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Warped Stripes on Paper #1073
Paper CC BY-SA 3.0A seamless background of warped stripes on paper.
Source V. Hartikainen
Light Brown Wallpaper With Vertical Stripes #905
Stripes CC BY-SA 3.0This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
Fabric pattern 3 (colour 6) #2382
Fabric CC 0Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Light Paper Fibers #835
Paper CC BY-SA 3.0More in the paper realm, this time with fibers.
Source Jorge Fuentes
Wavy background #2022
Blue CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Mirrored Squares #123
Dark CC BY-SA 3.0Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Background pattern 273 #2042
Dark CC 0Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Wood@2X #50
Wood CC BY-SA 3.0Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
Prismatic Abstract Line Art Pattern Background 2 #567
Dark CC 0Prismatic Abstract Line Art Pattern Background 2
Source GDJ
GPlay@2X #736
Light CC BY-SA 3.0A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Graphcoders Lil Fiber@2X #730
Fabric CC BY-SA 3.0Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Wavy background #2021
Pink CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Paper 2 #21
Paper CC BY-SA 3.0New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
Rubber Grip #101
Dark CC BY-SA 3.0A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Background pattern 238 (colour 3) #2227
Blue CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Corrugation@2X #766
Light CC BY-SA 3.0The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk