Tileable Wood@2X #656
Wood CC BY-SA 3.0Not so subtle. These tileable wood patterns are very useful.
Source Elemis
More Textures
GPlay@2X #736
Light CC BY-SA 3.0A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Wood with flaky paint #2562
Wood CC 0A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
fawn spot pattern #2472
Dark CC 0The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
Dark Geometric #619
Dark CC BY-SA 3.0Continuing the geometric trend, here is one more.
Source Mike Warner
Wavy background #2014
Blue CC 0A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
"Seamless Bark", Website Background. #879
Wood CC BY-SA 3.0This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
Triangular@2X #1157
Gray CC BY-SA 3.0Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Background pattern 215 (colour 4) #2368
Green CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin