"Dirty Paper", Seamless Background #1059
Paper CC BY-SA 3.0A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
More Textures
Triangular@2X #1157
Gray CC BY-SA 3.0Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Small Steps #1312
Light CC BY-SA 3.0This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
Floral pattern 9 #2043
Dark CC 0The tile can be had by selecting the rectangle in Inkscape and using shift+alt+i. Remixed from a drawing in 'Flowers of Song', Frederick Weatherly, 1895.
Source Firkin
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
Background pattern 265 #2081
Dark CC 0Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
White Paperboard #374
Fabric CC BY-SA 3.0Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Interlocking pattern 3 (colour 2) #2405
Grid CC 0A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
Background pattern 227 (colour 6) #2309
Red CC 0A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Blue & Dark Well #1703
Wall CC 0Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
HIXS Evolution #609
Dark CC BY-SA 3.0Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
French Stucco@2X #698
Paper CC BY-SA 3.0Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Tileable Wood@2X #656
Wood CC BY-SA 3.0Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Rubber Grip #101
Dark CC BY-SA 3.0A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Mooning@2X #1141
Gray CC BY-SA 3.0The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Prismatic Polka Dots Mark II 2 No Background@2X #533
Noise CC 0Prismatic Polka Dots Mark II 2 No Background
Source GDJ
One in a Million #1346
Gray CC BY-SA 3.0Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Old Mathematics #43
Stripes CC BY-SA 3.0This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Floral background 18 #1834
Dark CC 0emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
Background pattern 200 variant #2505
Pink CC 0A version without colours blended together to give a different look.
Source Firkin
Page ornament #1991
Dark CC 0From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin