Upperx is a set of 100+ free grunge textures with a nice little story.

They are photographed from the old, oxidized, metallic & graffiti-painted doors at Barcelona's Poblenou, an old industrial neighborhood now in full transformation.

All images are in .JPG format, 850*637px size & 72 PPI resolution.

LoveTextures is a website presenting 150+ free textures which are created by them.

All the textures are categorized very well like fabric, grunge, wood textures & more. It is also possible to browse them by color.

Files offered are mostly around 2560×1707pixels at 300dpi which makes them suitable for print besides the web.

SeamlessTextures.net is a website presenting 55+ free textures & more added frequently.

From paper textures to grunge textures, all images are well-categorized.

The website is focused on seamless textures: textures that can be repeated infinitly without showing any edges.

They are created from creative commons licensed images that can be found on the net. And, you can also reach the source images of every texture presented.

Free grunge textures can be found at Grungetextures.com, a website which collects and presents great free grunge textures.

Textures are high quality JPG files and licenced as free for personal and non-profit use.

Textures are categorized well for easier navigation. For ex: you can easily find the wood textures, stone textures or the other ones.