Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Remixed from a JPG that was uploaded to Pixabay by susanlu4esm
Source Firkin
A seamless web texture of "green stone".
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso