Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Abstract Tiled Background Extended 12
Source GDJ
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
A bit strange this one, but nice at the same time.
Source Diogo Silva
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The image a seamless pattern derived from a weed which I can't identify.The original weed image is from here:https://jp.pinterest.com/pin/500744052301423641/
Source Yamachem
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green