8 by 8 pixels, and just what the title says.
Source pixilated
Tiny circle waves, almost like the ocean.
Source Sagive
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Abstract Tiled Background Extended 8
Source GDJ
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Colorful Floral Background 3 No Black
Source GDJ
This one has rusty dark brown texture.
Source V. Hartikainen
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Retro Circles Background 5 No Black
Source GDJ
It’s big, it’s gradient—and it’s square.
Source Brankic1979
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen