You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Number five from the same submitter, makes my job easy.
Source Dima Shiper
A free background tile with a pattern of pink bump dots. This background tile is sweet! Moreover, it's designed for use as website backgrounds.
Source V. Hartikainen
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Tile-able Dark Brown Wood Background. Feel free to use it as a background image in your designs or somewhere on the web. By the way, the color seems to be close to Coffee Brown.
Source V. Hartikainen
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
A seamless paper background colored in pale yellow.
Source V. Hartikainen
Prismatic Groovy Concentric Background No Black
Source GDJ
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin