Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A simple bump filter made upon request at irc #inkscape at freenode. Made a screen capture of the making here: https://youtu.be/TGAWYKVLxQw
Source Lazur URH
A seamless background of warped stripes on paper.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Remixed from a PNG that was uploaded to Pixabay by gingertea
Source Firkin
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Embossed lines and squares with subtle highlights.
Source Alex Parker
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
The original enhanced with some gradients.
Source Firkin
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from a drawing in 'Some account of the Worshipful Company of Ironmongers', John Nicholl, 1866.
Source Firkin