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puddletag is an audio tag editor primarily created for GNU/Linux, similar to the Windows program Mp3tag. It uses a spreadsheet-like layout so tags can be edited by hand and visible. It supports extracting tag information from filenames, renaming files based on tags with patterns, and basic tag editing. Functions include text replacement, trimming and case conversion, and Actions automate repetitive tasks. Web lookups using Amazon, Discogs, FreeDB and MusicBrainz are supported.

Qtile is a full-featured, hackable tiling window manager written and configured in Python. It defines key bindings, groups, layouts and widgets such as a bar and prompt in its configuration, and supports switching virtual terminals on Wayland.

Qtractor

qtractor.org

Qtractor is an Audio/MIDI multi-track sequencer application written in C++ with the Qt framework. The target platform is Linux, using JACK for audio and ALSA for MIDI. It is free, open-source software distributed under the GNU General Public License version 2 or later.

r/unixporn

reddit.com

r/unixporn points to a Reddit community or thread with discussion, guides, updates, or shared resources.

RackRat

rackrat.net

RackRat is a deal finder for rackmount servers listed on eBay. Listings are ranked by the site's deal score, and filters cover rack units, drive bays, power supplies, rails and pickup or variable shipping. The site notes that it may earn a commission from qualifying purchases.

ranger

ranger.fm

ranger is a console file manager with VI key bindings. It provides a minimalistic curses interface with a view on the directory hierarchy and ships with rifle, a file launcher that automatically finds the program to use for a file type. It requires Python and a pager like less to run.

Rapid

damonlynch.net

Rapid Photo Downloader is free software released under the GNU GPL license. It downloads photos and videos from cameras, phones and memory cards, can download from multiple devices simultaneously, and backs up files as they are downloaded. It runs under Linux desktops and on the Windows Subsystem for Linux on Windows 11.

Reference Card

i3wm.org

The i3 Reference Card is a quick-reference document for i3, a tiling window manager with extended Xinerama support that uses libxcb instead of xlib. The card lists default keybindings for opening a terminal, focusing and moving windows, toggling fullscreen and floating, switching workspaces, opening the dmenu launcher, and reloading, restarting or exiting i3.

rEFInd is a boot manager for computers based on EFI and UEFI, presenting a menu of boot options at startup. It is a fork of the rEFIT boot manager and expands on its capabilities, including direct launching of Linux kernels and support for Secure Boot. It is not a boot loader.

RelaGit is a graphical Git client built with SolidJS and Electron, available for Windows, macOS, and Linux. It provides extensible workflow and theme APIs for managing source code, and integrates with GitHub, GitLab, and Codeberg. Downloads are labeled Beta, and macOS 10.14 or later is required.

Remmina

remmina.org

Remmina is a free, open-source remote desktop client for protocols including RDP, SSH, SPICE, VNC, and X2Go. It provides remote access screen and file sharing to a desktop and is available in 67 languages and 50+ distributions.

Repology

repology.org

Repology is a service that monitors package repositories and other sources, comparing package versions across them. It shows in which repositories a project is packaged, which version is the latest, which needs updating and who maintains the package. It is aimed at package maintainers, software authors and users, and offers an API.

RetroDECK

retrodeck.net

RetroDECK is a retro gaming platform for Linux, available from Flathub as a Flatpak. Powered by the RetroDECK Framework and ES-DE frontend, it bundles emulators, engines, ports, clients and utilities pre-configured for use.

Rim's Linux Wiki is a wiki that provides a list of tools for GNU/Linux systems. The site is noted to be in a very early stage of development, and currently includes a system tools section.

rofi

davatorium.github.io

Rofi Documentation hosts the web version of the rofi manpages, grouped by rofi version, together with guides published over past years. The guides cover topics such as transparency, positioning, plugins, dynamic themes, keys, actions and thumbnails. Downloads, installation instructions and themes are also listed.

SeaFile

seafile.com

Seafile is an open source, self-hosted file sync and share solution. It offers granular sharing permissions, multi-level file tagging, and built-in collaborative docs and wiki. The software supports access from any device and includes encryption and audit logs.

SeaShore

sourceforge.net

Seashore is a free, open-source image editor for macOS built entirely in Cocoa. It offers advanced tools such as multiple layers and alpha channel editing, alongside basic gradient, texture, text and brush tools. The project states that work on Seashore is being deprioritized in favor of Seahorse.

Securely Wipe Disk

wiki.archlinux.org

An ArchWiki page describing how to securely wipe a disk by writing new data over every bit. It covers common uses such as wiping all data before a device is given away or sold, and preparing a drive for block device encryption using random data.

Server World

server-world.info

Server World is a site for people who build network servers with operating systems such as CentOS, Ubuntu, Fedora, Debian and Windows Server. It publishes configuration guides covering Ubuntu installation, NTP and SSH servers, DNS and DHCP servers, and storage servers.

Shortshare

shortshare.app

Shortshare is a utility application for URL shortener services, supporting 14 established services plus custom APIs and self-hosted solutions such as YOURLS. It shortens URLs via a menu bar icon, keyboard shortcut, Safari App Extension, Share Extension or the Windows Share menu, and supports custom URL keywords where the service allows. Link history synchronises across macOS and iOS devices via iCloud. The developer states it is no longer available for iOS and macOS.

Shortwave

flathub.org

Shortwave is an internet radio player distributed via Flathub. It provides access to a database of over 50,000 radio stations. Users can create personal libraries of favorite stations, search for stations, have tracks automatically recognized with the option to save them, and play audio on supported network devices such as Google Chromecasts. It integrates with the GNOME desktop environment and has a responsive layout for different screen sizes. Version 5.1.0 added minor improvements and bug fixes including selectable track titles, accessible station search, faster cover art loading and a maximum recording duration.

Shortwave

gitlab.gnome.org

Shortwave is a project hosted on GitLab under the World group that lets users listen to internet radio. It is licensed under the GNU General Public License v3.0 or later.

ShuffleStacks

shufflecake.net

Shufflecake is a Free/Libre and open-source Linux tool for creating multiple hidden encrypted volumes on a storage device, scrambled across existing storage space and indistinguishable from random noise when not decrypted. It aims to provide plausible deniability for hidden filesystems. The software is experimental and the project advises against relying on its security for important use.

Sim Daltoinism

michelf.ca

Sim Daltonism is a color blindness simulator that shows colors as perceived with various types of color blindness. On iOS it uses the device camera; on Mac it filters a region of the screen. The project is open source.