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

AE plugins that can be used in Adobe After Effects and many other applications, e.g. Premiere Pro, Premiere Elements and Final Cut Pro.

Free After Effects Plugins

Commercial After Effects Plugins

Premiere plugins that can only be used in Adobe Premiere, but offer various special features e.g. animated effects.

Free Premiere Plugins

Commercial Premiere 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

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

Here are some tutorials from The Plugin Site:

Installing Plugins

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