Click to download 9 free high res vignetted paper textures from Lost & Taken
Free textures: Vignetted vintage paper
Tagged: vignette
Quickly adding a vignette to your image in Photoshop
Vignetting an image is a way of highlighting a subject in the image by making the edges of the image darker or lighter. There are more than a few ways to add a vignette to an image in Adobe Photoshop, but by far the easiest way is to use the built-in Lens Correction tool. Step 1: Start by opening your image in Photoshop. An image with the subject in or close to the center works best, but isn’t necessary.
Image before vignette
Easily add vignettes to your Photoshop images
It’s a really old technique, and looks great when done properly. But adding Vignettes for some is overly complex. One of the easiest methods I’ve come across is this tip at LifeClever. 
But I’m lazy, so I’ll go even further into the “easy” method. With Photoshop CS2, Adobe added a nifty little filter that does, among other things, vignettes. Here’s how it works: Make sure your image is in RGB mode. Select Filter>Distort>Lens Correction… There are several sections of this filter, but we’re going to use (obviously) the Vignette portion. First thing you may want to do is turn off the grid with the checkbox at the bottom of the dialog window. Slide the Amount slider under Vignette toward darken. This adds darkness around the edges and corners of your image. Now you adjust the amount of vignetting with the Midpoint slider. Move it to the right to have less of the image darkened or to the left to have more of the image darkened. That’s it. You can also apply the same technique to a layer filled with white above your image and set the layer effect to Multiply – this will allow you to adjust the darkness later if you wish.