Are The GIMP extensions Free?

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Extensions Freedom

Many extensions have been created for important software, like Firefox, OpenOffice.org and The GIMP. Unfortunately, only a few extensions you that are avaible on Mozilla site and not all OOo extensions are Free software. That does not always mean that the authors wanted to create proprietary software. There are some misconcepts about this point:

On the FSF site, you can find how to use GNU licenses for your software. If you are a developer, PLEASE read.

Free extensions for other software

Free GNU/linux distributions do not include non-Free extensions for any software. If you can find some non-Free extensions in their repository, it’s a bug – please report it.

GNU IceCat (the Free fork of Firefox) has a list of Free add-ons (extensions and themes).

As far as I understand, LibreOffice (fork of OOo not owned by Oracle) is not going to distribute/promote any non-Free extensions. If you know I’m wrong about this, please let me know as soon as you can.

The Gimp extensions

Sinces some monthes, I’m thinking about creating a list of Free The GIMP extensions similar to the GNU IceCat’s list. Fortunately, I discovered that only a free extensions are not free, so it’s much easier to create a non-Free extensions list.

My work is not complete and is ongoing. Here you can find a partial list of non-Free The GIMP extensions that are avaible on the GIMP official site. The Note column explains why the extension is not Free – but, in some cases, it also explains why it is not a major trouble. If you want to help, please feel free to contact me.

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All Plugins
Plugins Without Copyright
Plugins Without License
Plugins With Invalid License
Generic (invalid) GPL

Known non-free GIMP extensions table
Name Copyright License Notes
"Unit" tests for PDB functions accessible by Script-Fu     No license; Copyright owner unspecified
Add Rule for Thirds guides Chris Mohler GPL3 License note: “License: GPL v3”
Advance Tone Mapping   GPL3+ Copyright Owner Unspecified
Amiga Glow Icons Eugene Sobolev aka aGGreSSor^tPA   No license
anitools     No license, Unspecified copyright owner
arclayer Akkana Peck GPL Generic GPL
Assemble Relic Super-screenshot     No license
Auto rotate with a vector     No license; Unspecified copyright owner
Barcode   GPL3 License is only specified on site; Unspecified copyright owner
Batch Brushes     No license; Copyright owner unspecified
batch cartoon effect     No license; Copyright owner unspecified
Batch Convert to Tif-grayscale     No license; Copyright owner unspecified
Batch Edit Color Balance, Brightness and Contrast     No license; Copyright owner unspecified
Batch Tools Watermark Remigio Conti GPL GPL is too generic
Batch watermarking and resizing Alexander Hadjiivanov GPL GPL is too generic
Blizzard BLP importer Coy Barnes GPL2 Some relevant files do not have a license note
Border Guides     No license; Copyright owner unspecified
Bump Text - Watermark   GPL2+ Copyright owner unspecified
Burnt Paper     No license; Copyright owner unspecified
Calendar maker   GPL2+ Copyright owner unspecified
Center Guides     No license; Copyright owner unspecified
Center Layer     No license; Copyright owner unspecified
Color Scheme Helper for Gimp     No license; Copyright owner unspecified
Color Spotter     Source code has an informal note; binary .gz has no license
Colour Match     The source code license note is: “License: GPLv2.0”; Binary has no license
Comic Book Filters Joe Kitella   No license
Comic strip John Harris, Joe Kitella   No license; Based on Comic Book Filters; Copyright note wrong and incomplete
Count tiles for a mosaic Chris Mohler GPL3 License note is: “License: GPL v3”
Create Paired Layers of numbered files into single psds     No license; Copyright owner unspecified
Crop to center the selection Scott Pakin   No license
Cropp a webpage automatically Bastian Schnitzler   No license
crosseye2anaglyph     No license; Copyright owner unspecified
Crosshair Guides Gregory M. Ross   No license
CSSdev for Gimp 0.5     No license; Copyright owner unspecified
Cut, Copy, and Paste Multiple Layers     Copyright owner unspecified
dechroma   GPL2+ Copyright owner unspecified
Demonstrate built-in GUI widgets for Gimp plugins written in Python     No license; Copyright owner unspecified
Descreen     No license; Copyright owner unspecified
Diagonal Grid Roy Johnson   No license; Copyright owner unspecified
Diffraction     No license; Copyright owner unspecified
Digital Negative Calibration Pattern     No license; Copyright owner unspecified
Djvu Read plugin     No license; Copyright owner unspecified
dorylinux impaginatore   GPL2+ Copyright owner unspecified
Double HSV Film Grain VangaurdVagabond   No license
Draw guides     No license; Copyright owner unspecified
Drawable Multiplication Gino D   Contains The GIMPS's copyright notice and license, but no license is specified for the extension
DRI with 3 images of one scene     No license; Copyright owner unspecified
duotone   GPL2+ Copyright owner unspecified
DustCleaner ? ? Couldn't verify package freedom
DvdAuthor-Buttons   GPL2 No license in source code; Copyright owner unspecified
Export all layers to Anime Studio 5 project (v2)     No license; Copyright owner unspecified
Export All Layers to Anime Studio Project (ANME)     No license; Copyright owner unspecified
Export Layers as PNG Chris Mohler GPL3+ License note: "License: GPL v3+"
Export Selection     No license; Copyright owner unspecified
Extend Layer To Image Size   GPL2+ Copyright owner unspecified
Film Grain Conor Dube   No license
Find and Replace Text Chris Mohler GPL3 License note is: "License: GPL v3"
Flames     No license; Copyright owner unspecified
Flip Cells - picture filter   GPL2 License note: "Nitrofurano - 0806241812 - GPL2 licence"
Four panel Comic page script     No license; Copyright owner unspecified
fourier Remi Peyronnet   No license
GAL   Free Copyright owner unspecified
generate three vista plus (mac) type buttons     No license; Copyright owner unspecified; Vista/Mac buttons are not free
Gimp IDE     No license; Copyright owner unspecified
GIMP Octave Plugin Winston Chang, elsamuko GPL3+ File embed.cpp has no license
GIMP Plugin to export fonts and bitmaps for ks0108 LCDs     No license; Copyright owner unspecified
GIMP XMLRPC-Server     No license; Copyright owner unspecified; However, the plugin is not finished
Glass Selection script   GPL3+ Copyright owner unspecified
Half Tile Offset     No license; Copyright owner unspecified
Halftone Cluster     No license; Copyright owner unspecified
Heal selection (fix to: Smart remove selection) Paul Harrison GPL2 Requires Resynthesizer, which has freedom problems
HQ_Rescale (Hight Quality Rescale) ? ? Couldn't verify
ice logo     No license; Copyright owner unspecified
Import Kuler (ASE) palettes Chris Mohler GPL3 License note: "GPL v3"
Initial image Mr-L   No license
Iterated Function System (IFS) François Gingras Use & distribute as you please, please give credit Freedom to modify and distribute derived works is not granted
Iterative Save Mircea Purdea   License note: "This plugin (...) is distributed under an Apache license"
jp-polaroid     No license; Copyright owner unspecified
L-system & turtle graphic     No license; Copyright owner unspecified
Layer Informations Salvatore Celli   No license
LayerGroups subsystem for Gimp Joseph Miller, Miguel Oliveira   No license
Lighting Effect Tom Bech, Federico Mena Quintero GPL2+ Some files have no license and copyright note
Netpbm2Gimp   GPL3 No license or copyright owner specified in the sources
Resynthesizer Paul Harrison GPL2 No license in source code
watermark Doug Reynolds   No license (Release: 2006-May - Check date: 06/11/2011)
Watermark guaracy (?) GPL3+ Copyright owner unspecified (in source file); Copyright year unspecified (in source file) - Release: n/a, Check date: 21/01/2011
Wavelet decompose Marco Rossini GNU GPLv2+ - Source code (.c files): License statement not complete (can’t say if acceptable) - Translations: No license in some translation (pl, ru) - Release: n/a (upd: November 18, 2008), Check date: 21/01/2011
Wavelet decompose 0.1.2 Win 32 Binary Francois_C (?)   Binary: couldn’t verify - Release: n/a (upd: January 12, 2009), Check date: 21/01/2011

88 Extensions Found

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Notes:

>> Browse Source Code


Creative Commons License
List of The GIMP non-free extensions by Santec is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.