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Encode image frames into GIF animations

Read and write image metadata in many formats

Manage EXIF, IPTC, XMP and ICC metadata

Convert Japanese text encodings and kana forms

Check spelling with Hunspell-format dictionaries

Check page markup, links, redirects and language references in your browser.

A scriptable organiser for digital music collections

Small shared-secret VPN for a client-to-server connection

Parallel video encoding with scene-level quality control

Convert structured text into HTML, office, and documentation formats

Convert timed text through configurable readers, filters, and writers

Convert, combine, and inspect firmware load-file formats

Translate files between character sets with a CLI frontend

Retrieve files and mirror sites without a desktop

Transfer data across many Internet protocols

Upload temporary files from command-line workflows

Compose image conversions and transformations in a shell

Trace routes with network context

Maintain DNS zones with a command toolbox

Look up current domain registration through RDAP

Structural PDF transformations from the command line

Command-line page imposition through LaTeX

CSS typesetting with browser previews and PDF export

Extract PDF tables using configurable parsers and a CLI