Grid Paper Background (Blue Gray) #1162
Grid CC BY-SA 3.0A free grid paper background pattern for using on web sites.
Source V. Hartikainen
More Textures
Old Mathematics #43
Stripes CC BY-SA 3.0This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Colourful background #2008
Colorful CC 0Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Black Thread #599
Dark CC BY-SA 3.0Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Vintage Speckles #653
Wall CC BY-SA 3.0Lovely pattern with splattered vintage speckles.
Source David Pomfret
Geometric pattern #2006
Grid CC 0A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Background pattern 269 #2062
Dark CC 0A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Whitey@2X #110
Light CC BY-SA 3.0A white version of the very popular linen pattern.
Source Ant Ekşiler
Decorative divider #1996
Dark CC 0From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
Subtle Grunge@2X #1041
Light CC BY-SA 3.0A heavy hitter at 400x400px, but lovely still.
Source Breezi
Decorative divider 253 #2064
Dark CC 0From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin