Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
This background image is great for using in web design or graphic design projects. And don't forget to visit the homepage. I frequently update this resource with fresh tileable backgrounds.
Source V. Hartikainen
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
An alternative colour scheme to the original seamless pattern.
Source Firkin
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin