Photoshop plugins can be used in dozens of image editing applications including Photoshop, Elements, Paint Shop Pro, Photo-Paint, PhotoImpact and Irfanview.

Free Photoshop Plugins

Filter Factory Plugins

Plugins By Category

Commercial Plugins

Free Photoshop-Compatible Tools

Free Photoshop Panels

Commercial Photoshop Panels

There are various types of add-ons available for Adobe Lightroom. For convenience they are named plugins here, although they are usually scripts or external programs.

Free Lightroom Plugins

Commercial Lightroom Plugins

Here are some articles about various plugin topics:

Plugins Essentials

Free Plugins for Photo Editing

The Big Picture - Image Enlargement Plugins


Plugin Guide #1 - Harry's Filters

Plugin Guide #2 - Cybia Plugins

Plugin Guide #3 - Rosenman Filters

Plugin Guide #4 - Xero Plugins

Plugin Guide #5 - Mehdi Plugins

Interviews with various plugin developers and artists:

Plug-Talk #1 with Andrew Buckle (GraphicXtras.com)

Plug-Talk #2 with Nils Kokemohr (nik multimedia)

Plug-Talk #3 with Alex Hunter (FilterMeister)

Plug-Talk #4 with Jeff Butterworth (AlienSkin)

Plug-Talk #5 with Harald Heim (The Plugin Site)

Plugin Artists #1 - Stefan Gesell

Here are some tutorials from The Plugin Site:

Installing Plugins

Using the PhotoWiz Standalones under MacOS X

Plugin Commander Tutorials

Plugin Creation Tools

Edge & Frame Tutorials:
Photoshop, Paintshop Pro, Photo-Paint, Painter, PhotoImpact, Picture Publisher, PhotoDraw, CorelXara, GraphicConverter, Ultimate Paint, Adobe Premiere, After Effects, Media Studio Pro

Advanced Edge & Frame Tips for Photoshop, Paintshop Pro, Photo-Paint and PhotoDraw

Several polls about various topics were conducted on this site throughout the years. Here are the results: