Tessellation 16 (colour 3) #2213
Green CC 0The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
More Textures
Colourful background 32 #2173
Colorful CC 0Colourful background achieved with gradient fills.
Source Firkin
Square ornament 37 #2177
Dark CC 0Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Soft Kill@2X #319
Dark CC BY-SA 3.0Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Background pattern 10 #216
Noise CC 0A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Dark Wall #817
Dark CC BY-SA 3.0Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Background pattern 227 (colour 3) #2312
Pink 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
Floral design 108 #1706
Dark CC 0Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Seed #1289
Wall CC 0Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Leafy frame 32 #1714
Dark CC 0Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Soft Pad@2X #614
Fabric CC BY-SA 3.0Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Prismatic Groovy Concentric Background 3 No Black #459
Noise CC 0Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Prismatic Chevrons Pattern 5 With Background@2X #470
Dark CC 0Prismatic Chevrons Pattern 5 With Background
Source GDJ
P4 #1111
Light CC BY-SA 3.0I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Cloth Alike@2X #1094
Light CC BY-SA 3.0You guessed it – looks a bit like cloth.
Source Peax Webdesign
blocky filter pack 2 #158
Noise CC 0Wasn'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
Grid Me@2X #606
Grid CC BY-SA 3.0Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Background pattern 225 (colour 2) #2326
Yellow CC 0Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Vaio #675
Diamond CC BY-SA 3.0I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
Abstract Water Texture (Seamless) #890
Water CC BY-SA 3.0An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen