Zig-zag pattern 3 #2416
Grid CC 0A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
More Textures
Wavy background #2023
Pink CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Blue & Dark Well #1703
Wall CC 0Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Skin Side Up@2X #848
Light CC BY-SA 3.0White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Escheresque Dark #1064
Dark CC BY-SA 3.0A comeback for you: the popular Escheresque, now in black.
Source Patten
Page ornament 21 #2361
Dark CC 0From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Prismatic Groovy Concentric Background 2 #453
Noise CC 0Prismatic Groovy Concentric Background 2
Source GDJ
Silver Scales #189
Light CC BY-SA 3.0Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Navy@2X #985
Dark CC BY-SA 3.0It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Paper 3@2X #32
Paper CC BY-SA 3.0Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Green Background Pattern with Warped Vertical Stripes #1328
Green CC BY-SA 3.0Green Background Pattern
Source V. Hartikainen
Wall #4 Light #779
Wall CC BY-SA 3.0I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Page ornament #1993
Dark CC 0From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Background pattern 263 #2073
Pink CC 0Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
Dark Tire@2X #704
Dark CC BY-SA 3.0Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Background pattern 261 #2076
Dark CC 0Inspired by a pattern found in 'A General History of Hampshire, or the County of Southampton, including the Isle of Wight', Bernard Woodwood, 1861
Source Firkin
Floral pattern 6 #2461
Fabric CC 0A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
Vertical Cloth #597
Dark CC BY-SA 3.0You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Thick Textured Brown Paper #1070
Paper CC BY-SA 3.0A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen