Computer stuff

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Ff (GNU AGPL v3.0 or later). A simple wrapper around GNU find for people who are too lazy to write commands like find directory/ -iname \*name\* (they can write ff name directory/ instead). No need for confusingly named meme programming language projects.
GRDDL transformation from Atom feed to equivalent RDF document (GNU AGPL v3.0 or later).
GRDDL transformation from ECMAScript licence web labels to RDF document (GNU AGPL v3.0 or later).
Korn Shell man (zlib License). A simple reimplementation of commands for viewing and searching man pages.
Lesspipe (Polyna’s version) (GNU GPL v3.0 or later). A program to make the Less terminal pager display many different file formats in human readable form. Unfinished, but works well; to activate it, put it in /usr/local/bin, make it executable, and add something like eval "$(lesspipe --init)" to your shell initialisation file.
Zerofetch (GNU AGPL v3.0 or later). A minimalist command line system information tool (similar to ScreenFetch) for GNU/Linux. It only displays information that can be easily found using the pure GNU Bash, without executing any external commands and without any distribution-specific special cases, so it does not display logos for example.

Atom to AtomOwl Turtle XQuery (2-Clause BSD License). With the Saxon processor dependency removed.
Colortar (3-Clause BSD License). By M. Abramowitz, improved by me. Colours detailed lists of archive contents, similar to the way GNU ls (in GNU coreutils) would colour a directory listing. Run perldoc colortar.pl to see usage examples and a list of programs it works with.
GRDDL transformation of common feed formats to RSS 1.0 (GNU GPL, any version). By M. Frederiksen.
jPDF Tweak 1.1 (GNU AGPL v3.0 or later). By M. Schierl. Combine, split, rotate, reorder, watermark, encrypt, sign and otherwise manipulate PDF files. Re-packaged for POSIX-like systems. To install, unpack it into ~/.local or /usr/local; to uninstall, run the script <path to where you installed it>/share/jpdftweak/uninstall.sh.
JPdfBookmarks 2.5.2 (GNU GPL v3.0 or later). By F. Petrocchi. Create and edit bookmarks in PDF files. Re-packaged for POSIX-like systems. To install, unpack it into ~/.local or /usr/local; to uninstall, run the script <path to where you installed it>/share/jpdfbookmarks/uninstall.sh.
Vis (3-Clause BSD License). A GNU/Linux port of the BSD utilities for displaying non-printable characters in a visual format and vice versa.