Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This one is amazing, truly original. Go use it!
Source Viahorizon
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
The classic notebook paper with horizontal stripes.
Source Are Sundnes
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
Colourful background achieved with gradient fills.
Source Firkin