Picmal: Open source acknowledgements

Picmal wouldn't exist without a lot of other people's open-source work. Here's what the app bundles, where to find each project's source, and which license it ships under.

Most of the source links below point straight at the upstream project. If one rots, email support@picmal.app and I'll send the source tarball directly — free, for at least three years after each release that includes the component.

Bundled software

Component	Version	License	Source
FFmpeg	8.0	LGPL-2.1-or-later	Source
ImageMagick	7.1.2-12	ImageMagick License	Source
libheif	1.21.1	LGPL-3.0-or-later	Source
usvg (resvg project)	0.48.1	MPL-2.0	Source
VTracer	0.6.5	MIT	Source
oxipng	10.0.0	MIT	Source
mozjpeg	4.1.5	BSD-3-Clause / IJG	Source
Exiv2	0.28.8	GPL-2.0-or-later	Source
Gifsicle	1.96	GPL-2.0-or-later	Source
pngquant	3.0.4	GPL-3.0-or-later	Source

Details

FFmpeg

• Version: 8.0
• License: LGPL-2.1-or-later
• Bundled as: ffmpeg
• Upstream: https://ffmpeg.org/
• Source: https://ffmpeg.org/releases/ffmpeg-8.0.tar.xz

Used as a separate executable for audio and video conversion. Built from unmodified upstream sources in an LGPL configuration (no GPL components; hardware encoding via Apple VideoToolbox). Statically includes libvpx, SVT-AV1, dav1d, libwebp, OpenJPEG, Opus, LAME, Vorbis, Theora, libass, HarfBuzz, FreeType, and FriBidi.

ImageMagick

• Version: 7.1.2-12
• License: ImageMagick License
• Bundled as: magick_arm64, magick_rosetta, libMagickCore, libMagickWand
• Upstream: https://imagemagick.org/
• Source: https://imagemagick.org/archive/ImageMagick-7.1.2-12.tar.xz

Used for image conversion and metadata handling. License is Apache-2.0 compatible.

libheif

• Version: 1.21.1
• License: LGPL-3.0-or-later
• Bundled as: libheif.1.dylib, libde265.0.dylib, libaom.3.dylib
• Upstream: https://github.com/strukturag/libheif
• Source: https://github.com/strukturag/libheif/releases/download/v1.21.1/libheif-1.21.1.tar.gz

HEIC/AVIF decoding for ImageMagick, with libde265 1.0.16 (LGPL-3.0) and libaom 3.13 (BSD-2-Clause). Built without any GPL encoder; HEIC encoding uses Apple's frameworks instead.

usvg (resvg project)

• Version: 0.48.1
• License: MPL-2.0
• Bundled as: usvg
• Upstream: https://github.com/linebender/resvg
• Source: https://crates.io/api/v1/crates/usvg/0.48.1/download

Used as a separate executable for SVG optimization (replaced svgcleaner).

VTracer

• Version: 0.6.5
• License: MIT
• Bundled as: vtracer
• Upstream: https://github.com/visioncortex/vtracer
• Source: https://github.com/visioncortex/vtracer/archive/refs/tags/0.6.5.tar.gz

Used as a separate executable for the Vectorize tool (bitmap to SVG).

oxipng

• Version: 10.0.0
• License: MIT
• Bundled as: oxipng
• Upstream: https://github.com/shssoichiro/oxipng
• Source: https://github.com/shssoichiro/oxipng/archive/refs/tags/v10.0.0.tar.gz

Used as a separate executable for PNG lossless optimization.

mozjpeg

• Version: 4.1.5
• License: BSD-3-Clause / IJG
• Bundled as: cjpeg, djpeg
• Upstream: https://github.com/mozilla/mozjpeg
• Source: https://github.com/mozilla/mozjpeg/archive/refs/tags/v4.1.5.tar.gz

Used as separate executables for JPEG encoding and decoding.

Exiv2

• Version: 0.28.8
• License: GPL-2.0-or-later
• Bundled as: exiv2, libexiv2.28.dylib
• Upstream: https://exiv2.org/
• Source: https://github.com/Exiv2/exiv2/releases/download/v0.28.8/exiv2-0.28.8-Source.tar.gz

Used as a separate executable for image metadata (EXIF/IPTC/XMP) editing. Direct download build only — the Mac App Store version writes metadata with Apple's ImageIO instead.

Gifsicle

• Version: 1.96
• License: GPL-2.0-or-later
• Bundled as: gifsicle
• Upstream: https://www.lcdf.org/gifsicle/
• Source: https://www.lcdf.org/gifsicle/gifsicle-1.96.tar.gz

Used as a separate executable for GIF optimization. Direct download build only — the Mac App Store version uses ImageMagick for GIFs.

pngquant

• Version: 3.0.4
• License: GPL-3.0-or-later
• Bundled as: pngquant
• Upstream: https://pngquant.org/
• Source: https://pngquant.org/pngquant-src.tar.gz

Used as a separate executable for lossy PNG quantization. Direct download build only — the Mac App Store version quantizes with ImageMagick + oxipng.

Written offer for source

Want the corresponding source for any of the GPL, LGPL, or AGPL components above? Email support@picmal.app and I'll send it. This offer stands for at least three years from the release of the Picmal version that bundled the component, per GPL-2.0 § 3(b), GPL-3.0 § 6(b), and LGPL-2.1 § 6.

Spotted something wrong?

If you think Picmal isn't meeting one of these obligations, email support@picmal.app and I'll fix it.