X for X-Process (Cross Process)
This is a throwback to the old film processing days. Cross Processing was a case when developing solutions for a certain type of photo was used, either by mistake or intention to a different one. The results used to unpredictable and fairly in consistent, and in a lot of cases, made the photos distinct and appealing. Now, with softwares like Picasa and mobile apps like Pixlr-o-matic, cross process photos are easy to make. Dont over use this, but once a while, they do liven up the photos.