Dark & Gray #1299
Stone CC 0ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
More Textures
Background pattern 215 (colour 2) #2370
Blue CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Seamless Prismatic Pythagorean Line Art Pattern No Background #569
Light CC 0Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Prismatic Curved Diamond Pattern 6 No Background@2X #546
Dark CC 0Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Batthern@2X #325
Grid CC BY-SA 3.0Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Paper #657
Paper CC BY-SA 3.0Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Background pattern 234 (colour 2) #2258
Green CC 0Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Background pattern 215 #2371
Brown CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Fruit on a branch #1968
Dark CC 0From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Gray Diagonal Stripes Background #900
Stripes CC BY-SA 3.0A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Use Your Illusion@2X #918
Dark CC BY-SA 3.0A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Gold Wall #1242
Wall CC 0Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Abstract Geometric Monochrome Pattern Prismatic No Background@2X #809
Noise CC 0Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Carbon Fiber@2X #4
Carbon CC BY-SA 3.0A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
Leafy frame 32 #1714
Dark CC 0Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Criss-cross pattern #1895
Dark CC 0A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
Seamless Pink Background Texture #1233
Pink CC BY-SA 3.0A seamlessly tileable pink background texture.
Source V. Hartikainen
Background pattern 245 (colour 6) #2187
Colorful CC 0This was formed by distorting an image of a background on Pixabay.
Source Firkin
Greek key pattern 5 #2294
Dark CC 0Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Abstract Ellipses Background Grayscale #814
Dark CC 0Abstract Ellipses Background Grayscale
Source GDJ
White tiles@2X #728
Grid CC BY-SA 3.0A nice and simple white rotated tile pattern.
Source Another One
Vintage tile background (colour 2) #2247
Pink CC 0A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin