Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
Colorful Floral Background 3 No Black
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
The name is totally random, but hey, it sounds good.
Source Atle Mo
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Prismatic Snowflakes Pattern No Background
Source GDJ
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A seamlessly tileable pink background texture.
Source V. Hartikainen
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Colour version of the original pattern.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless background tile of aged paper with shabby look.
Source V. Hartikainen
A free seamless background pattern for use on websites.
Source V. Hartikainen
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo