Simply put, a photo editing plug-in is a script or program that adds some type of additional functionality to the host photo editor. A lot of people refer to these applications as Photoshop plug-ins because most are developed with Adobe Photoshop in mind. However, just because a plug-in is advertised as a "Photoshop plug-in", that doesn't mean that it isn't compatible with other photo editors. In fact, many such plug-ins are also compatible with Paint Shop Pro, Photoshop Elements, and a host of other image editing applications, such as GIMP and IrfanView.
In this guide, we'll take a look at the top photo editing plug-ins that offer the best value for their price. Here, the term "best value" doesn't necessarily mean the plug-in is the cheapest in its class. Instead, we'll be looking at the add-ons that offer the most functionality and usability for their price. There are some cheap plug-ins out there that aren't worth the time it takes to download them, but on the other hand, there are some free ones that are simply amazing. Most of the better plug-ins, though, do have a price tag, but their capabilities make them well worth the price.
If you're just getting into the plug-in craze and are only interested in the free alternatives, you may want to take a look at the following lists in addition to this one:
Now, on with the list!