Fabric pattern 2 #2396
Fabric CC 0Not 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
More Textures
Little Knobs@2X #311
Light CC BY-SA 3.0White little knobs, coming in at 10x10px. Sweet!
Source Amos
Background pattern 203 #2486
Brown CC 0A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Decorative divider 245 #2079
Dark CC 0From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Twinkle Twinkle@2X #1011
Dark CC BY-SA 3.0A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Glossy Groove Stripe Pattern (Pale Orange) #967
Stripes CC BY-SA 3.0A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Dark Blue Gray Wallpaper Texture #901
Stripes CC BY-SA 3.0This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Background pattern 6 #226
Noise CC 0A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
Subtle White Feathers@2X #1104
Light CC BY-SA 3.0This one is amazing, truly original. Go use it!
Source Viahorizon
White Plaster #368
Wall CC BY-SA 3.0Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Flower Trail #741
Noise CC BY-SA 3.0Sharp pixel pattern, just like the good old days.
Source Paridhi
Mix Stone #1298
Stone CC 0ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
Dark Wall@2X #818
Dark CC BY-SA 3.0Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Background pattern 309 (colour 4) #1863
Green CC 0Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Old Mathematics #43
Stripes CC BY-SA 3.0This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Tex2res2 #719
Fabric CC BY-SA 3.0Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Ravenna@2X #355
Wall CC BY-SA 3.0I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Green Background With Leaves #1331
Green CC BY-SA 3.0It looks very nice I think.
Source V. Hartikainen
Dark Dot #647
Dark CC BY-SA 3.0That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Tessellation 11 (variant 2) #2539
Grid CC 0The original enhanced with some gradients.
Source Firkin
Random Grey Variations@2X #70
Stripes CC BY-SA 3.0Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Rebel@2X #830
Dark CC BY-SA 3.0Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers