Background pattern 214 (colour 6) #2372
Colorful CC 0A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
More Textures
White Sand #19
Light CC BY-SA 3.0Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Background pattern 302 (colour 2) #1893
Dark CC 0The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Wavy background #2020
Green CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Decorative divider 297 #1746
Pink CC 0From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
Prismatic Polka Dots 3 No Background@2X #529
Noise CC 0Prismatic Polka Dots 3 No Background
Source GDJ
Street Art Pattern #1196
Concrete CC BY-SA 3.0Looks 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
Background pattern 208 (colour 2) #2462
Grid CC 0A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Green Web Background, Seamless tile #1332
Green CC BY-SA 3.0Green Web Background, Seamless tile.
Source V. Hartikainen
Subtle Orange Emboss #97
Light CC BY-SA 3.0A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf