Photoshop Plugin Essentials There are many types of plugins available for web browsers, audio players, video tools and all kinds of applications. One of the most commonly used and popular type is Photoshop plugins, more accurately expressed as Photoshop-compatible plugins. Since their introduction by Adobe Systems in the early 90's, along with Photoshop 2.5, thousands of them have been developed by a few hundred individuals and companies worldwide. More than 50 image and video applications presently support Photoshop plugins to a more or less complete extent.