AviSynth is a script-based tool for video post-production.
The Pantarheon 3D AviSynth Toolbox is a set of scripted functions for AviSynth.
AVISynth UI is a user interface for the script based video editor AVISynth.
Jeeb / Avisynth
AviSynth+ is an improved version of the AviSynth frameserver.
Gimp WebP Plugin provides Gimp with the ability to load and export WebP images.
Some of the included functions cannot be found elsewhere.
GIMP Extensions is a handy plugin set which can improve your graphic design.
GIMP Massive Package for Windows and Mac, tons of plugins and extras.
It's a plugin that allows Avisynth scripts to be imported as normal video files.
Audio/video editing plugins for Adobe Premiere and Sony Vegas.
A professional photo retouching and image editing application package.
This is a plugin for Adobe Premiere Pro to import Avisynth scripts.
Dmitry Alexandrov aka dimzon
BeHappy is a reliable and powerful AviSynth-based audio transcoding tool.
It's a program that help you to use graphs to create working Avisynth scripts.
AvsP is essentially a text editor designed to help create AviSynth scripts.
The GIMP Team
GIMP is a free versatile graphics manipulation package.
GTK+, or the GIMP Toolkit, is a multi-platform toolkit.
Handy and free tool to help you manage several GIMP windows.
It contains DirectShow plugin, MPEG-2 plugin, WMV plugin, AC-3 Plugin, etc.
A software that combines OpenOffice.org, GIMP, VirtualDub, Audacity and Mozilla.
G'MIC has been made available as an easy-to-use plug-in for GIMP.