The clothing on my avatar (full picture here: http://ameesa.deviantart.com/gallery/40917766#/art/I-m-shocked-340037029?q=gallery:ameesa/40917766&qo=1&_sid=468972f1) is dressed in Fabricator Silkessence textures. You can use them on any item to make your own look. It’s incredibly handy for what is termed “kitbashing”. Taking elements of different outfits, and using shaders and shader presets to turn them into a cohesive, original outfit. My avatar is wearing a hat from London Vanity by Prae at Renderosity, the collar is from Alpha Soul not available at the moment, and the dress is here at DAZ Empire Elegance: http://www.daz3d.com/empire-elegance You .just select your item in the scene tab, select which surface of the item you want, in either the surfaces tab, or highlighted, and double click on the fabric you want.
Recently a contest was held for kitbashing, unfortunately no longer stickied, but has many examples of Fabricator and other shaders. Fabricator is a wonderful product to make things more original.
The other good thing is there are hundreds of freebie tiles for it, all saved in the correct format if you search Fabricator at Share Cg.
As everyone says, it’s a 2-click solution for retexturing clothing. First you apply a diffuse pattern, and then you add a “weave” which comprises bump, displacement, gloss and spec settings that can make your chosen fabric render as though it is everything from a chunky knit or canvas to satin, chiffon or organza. (There are dozens of weaves.
Many, many people use it and I have yet to hear a single complaint.
There are two more products that work in the same way: The Lacemaker and MachPack. The former uses displacement and transparency to create different kinds of lace and the latter is packed with masculine-orientated fabrics and textures.
There are a big amount of free presets in sharecg. Also any seamless texture can be used for create new presets.
I also find this page: http://www.patterncooler.com/editor/
You can customize color and tilling of differents designs, obtain a plain seamless texture and use in fabricator. It is free for personal renders and limited format