"Dirty Paper", Seamless Background #1059
 Paper  CC BY-SA 3.0

A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.

Source V. Hartikainen

 More Textures
Square Flower #1691
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Stone Wall & Dark #1548
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Concretia 3 #1410
 Gray  CC 0

Gamedev - Concrete Textures. CC0 License.

Source Davit Masia

Decorative divider 200 #2420
 Dark  CC 0

From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.

Source Firkin

Green & Grass #1368
 Green  CC 0

Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!

Source Linolafett

Seamless Marble Like Texture (Light Blue) #1033
 Stone  CC BY-SA 3.0

A seamless marble-like texture colored in light blue.

Source V. Hartikainen

Tessellation 16 #2215
 Yellow  CC 0

The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.

Source Firkin

Texturetastic Gray #615
 Paper  CC BY-SA 3.0

This ladies and gentlemen, is texturetastic! Love it.

Source Adam Pickering

Pink Clouds Background #1230
 Pink  CC BY-SA 3.0

Actually, there's no clouds in it, but I think it looks quite nice.

Source V. Hartikainen

Strawberry seamless pattern #208
 Noise  CC 0

This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.

Source Yamachem

Stone Wall & Blue #1525
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Subtle Zebra 3D #623
 Stripes  CC BY-SA 3.0

It’s a subtle zebra, in 3D. Oh yes!

Source Mike Warner

Vintage [email protected] #654
 Wall  CC BY-SA 3.0

Lovely pattern with splattered vintage speckles.

Source David Pomfret

blocky filter pack 2 #158
 Noise  CC 0

Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.

Source Lazur URH

Dotnoise Light [email protected] #309
 Wall  CC BY-SA 3.0

Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!

Source Nikolalek

Batthern #324
 Grid  CC BY-SA 3.0

Sometimes simple really is what you need, and this could fit you well.

Source Factorio.us Collective

Retro Circles Background [email protected] #421
 Dark  CC 0

Retro Circles Background 4

Source GDJ

Wet Paper Background (Pale Yellow) #1224
 Yellow  CC BY-SA 3.0

A seamless paper background colored in pale yellow.

Source V. Hartikainen

Background pattern 329 #1769
 Dark  CC 0

A pattern formed entirely from squares

Source Firkin

Starting Diamond Shape #137
 Light  CC BY-SA 3.0

Simple blue and line to mix.

Source SliverKnight

Batik #1671
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Wine [email protected] #34
 Light  CC BY-SA 3.0

Wine cork texture based off a scanned corkboard.

Source Atle Mo

Pine Bark #1276
 Wall  CC 0

Zero CC tileable pine bark texture, photographed and made by me. CC0

Source Sojan Janso

Background pattern 314 (colour 5) #1835
 Pink  CC 0

The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i

Source Firkin

Seamless Texture of Wood Planks #880
 Wood  CC BY-SA 3.0

Here's an yet another background for websites, with a seamless texture of wood planks this time.

Source V. Hartikainen

Tall plant #1818
 Dark  CC 0

From a drawing in 'The Christian Year', John Keble, 1880

Source Firkin

Stone Wall & Yellow #1519
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Swirl #1323
 Light  CC BY-SA 3.0

Lovely gray circles. What more can you ask for?

Source Uday

Black And White Floral Pattern Background Inverse #196
 Dark  CC 0

Black And White Floral Pattern Background Inverse

Source GDJ