I’ve linked to a lot of free textures here at The Graphic Mac over the years, and there are tons more to be found with a simple Google search. Quite a few of them are paint splatters or textures that you wish you could drop a white background out of. This can be quite tedious to do manually. Thankfully there’s an easier way that works pretty darn well.
MediaMelitia has a fantastic Photoshop Action set called Background Removal that’s free to download and use. The set includes three different actions to achieve different results. One version maintains the color of the foreground image, the other two remove the white background using the color parts as a black mask, as seen above. They offer clear instructions on the download page, along with when you might want to use the different action files.