The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Lovely pattern with splattered vintage speckles.
Source David Pomfret
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
I’m not going to use the word Retina for all the new patterns, but it just felt right for this one. Huge wood pattern for ya’ll.
Source Atle Mo
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin