Satin Weave #1044
Light CC BY-SA 3.0Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
More Textures
Checkered Light Emboss #280
Grid CC BY-SA 3.0Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Seed #1289
Wall CC 0Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Background pattern 8 (colour) #211
Noise CC 0Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Wide Rectangles #699
Wall CC BY-SA 3.0Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Robots@2X #126
Dark CC BY-SA 3.0And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Old Cardboard, Background Texture #1213
Cardboard CC BY-SA 3.0A seamless background texture of old cardboard.
Source V. Hartikainen
"Green Rhombuses", Seamless Background Pattern #1336
Green CC BY-SA 3.0A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
Fabric pattern 2 (colour 2) #2395
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
Background pattern blue #1955
Blue CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Pattern cleanup 4 #157
Noise CC 0An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Floral background 5 #2404
Fabric CC 0A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
White Wall #1105
Wall CC BY-SA 3.0Looks like an old wall. I guess that’s it then?
Source Viahorizon
Tactile Noise@2X #6
Dark CC BY-SA 3.0A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Background pattern 320 #1830
Pink CC 0Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Brick #1377
Wall CC 0Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett