A free background image with a seamless texture of cardboard. This texture of cardboard looks quite realistic, especially when is actually tiled.
Source V. Hartikainen
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A blue background wallpaper for websites. It has a seamless texture with vertical stripes. It looks quite nice not only when using as a tiled background on websites, but also on computer desktops.
Source V. Hartikainen
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Embossed lines and squares with subtle highlights.
Source Alex Parker
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
8 by 8 pixels, and just what the title says.
Source pixilated
A repeating background with wood/straw like texture.
Source V. Hartikainen