Linux

qpdf is handy for merging PDFs. Command line but quick to learn for most usage.

You’ve heard of it for sure, but shout out to Audacity. I used Cool Edit Pro for years before having to switch to Adobe Audition. The UI in Audacity feels surprisingly familiar and it does what I need it to do.

AutoKey automation / word expander tool.

• I reconfigure ALT + i/j/k/l to ↑←↓→ globally, and more similar shortcuts.
• It expands abbreviations of one's choice like "gCo" to git commit -m '
• One can assign scripts to abbreviations and hotkeys. E.g., when I press CTRL + Shift + [ it surrounds the selected text with a tag:

text_selected = clipboard.get_selection()
text_input = dialog.input_dialog(title="Wrap with a tag.", message="E.g., type cite to get <cite>x</cite>.", default="")
keyboard.send_key("<delete>")
clipboard.fill_clipboard(f"<{text_input[1]}>{text_selected}</{text_input[1]}>")
keyboard.send_keys("<ctrl>+v")

I'm likely not even harnessing AutoKey's full capabilities and it's already absolutely indispensable for being a huge time-saver and annoyance reducer.

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✍︎ arscyni.cc: modernity ∝ nature.

ffmpeg - www.deb-multimedia.org . I edit podcast videos for distribution to subscribers. High-quality video produces very large files but if they're only going to be watched on laptops, tablets, and phones, I can throw away a lot of bits without noticeably affecting quality on a phone screen.

And nothing does that better or faster than ffmpeg.

Aside from ones listed here:

System Tools

• WinApps - Run Windows applications seamlessly integrated into your Linux desktop environment, like native including Adobe products.
• Waydroid - Run Android applications in a container on Linux with full hardware access.
• Topgrade - Upgrade all your system packages and dependencies in one command.
• AM (AppImage Manager) - Easy AppImage management for installing, updating, and organizing portable applications.
• Starship - Fast, customizable cross-platform shell prompt with Git integration and status indicators.
• InShellisense - IDE-style IntelliSense autocomplete and suggestions for your terminal.
• Tabby - Modern terminal emulator with tabs, split panes, and extensive customization options.
• Zeit - Qt GUI frontend for scheduling tasks using at and crontab utilities.
• KWin Minimize2Tray - KDE extension that allows minimizing windows to the system tray instead of taskbar.
• Flameshot - Feature-rich screenshot tool with built-in annotation and editing capabilities.
• CopyQ - Advanced clipboard manager with searchable history and custom scripting support.
• Safing Portmaster - Free open-source application firewall with per-app network control, DNS-over-TLS, and system-wide ad/tracker blocking.

Productivity Tools

• DSNote - Offline speech-to-text, text-to-speech and translation app for note-taking.
• NAPS2 - User-friendly document scanning application with OCR and PDF creation capabilities.
• Morphosis - Simple document converter supporting PDF, Markdown, HTML, DOCX and more formats.
• Obsidian - Powerful knowledge management app with bidirectional linking and graph visualization.
• BeeRef - Minimalist reference image viewer designed for artists and designers.

Media & Entertainment

• Popcorn Time - Stream movies and TV shows via torrent with built-in media player.
• Nicotine+ - Modern Soulseek P2P client for sharing and discovering music files.
• XnView - Versatile image viewer, organizer, and converter supporting hundreds of formats.

Happy to list out the self hosted stuff too if there is interest.

The Docker Engine makes hosting applications over your network easy, if you have spare hardware I highly recommend setting up your own server.

Localsend is rad, super useful: https://localsend.org/

Send any file across different devices over the network. FOSS and fast. Highly recommend.

Pinta is the main one that comes to mind. I don't use it every day, far from it, and that's a part of why I love it. On the rare occasion that I have to do some image editing, I load up Gimp and then proceed to fight against it for at least a whole day to make it do the simplest of things before finally ragequitting. Then I load up Pinta and actually get the task done in either minutes or hours at most.

It's like old school MS Paint, but better. Simple, intuitive, no huge learning curve, just enough features to get my nonprofessional tasks done. It should be a distro default.

Ocenaudio for audio editing. It's not FOSS but it's native, simple to use, and doesn't have backend library issues I kept having with audacity.

I'm trying Linux for the first time as soon as a serving hard drive arrives, bookmarking this thread!

I would say Rymdport (https://github.com/Jacalz/rymdport). It's a GUI for the magic-wormhole tool (another recommendation in itself). It let's you easily and safely transfer files to another computer.

Logseq for notes and task tracking. It’s an open source alternative to obsidian. Life saver for tracking stuff at work.

https://logseq.com/

KDE Connect

• https://kdeconnect.kde.org/

I've used it a lot just to control audio or video playing on my computer from my phone. (Sometimes when I'm sat at my computer with multiple windows and workspaces open, I even find it easier just to hit my phone's lockscreen to pause the music.)

I'm starting to use some of its other features, too. E.g. copying & pasting and sharing files between phone and computer.

There's more too I need to explore.

• https://community.kde.org/KDEConnect

(Unfortunately, sometimes I get a 'device unreachable' error when both devices clearly have a working connection to the same router.)

Qalc. Best calculator ever hands down

I do a fair amount of pentesting and I'm on mobile, so I'll just list software.

Trufflehog & nosey parker (both kinda suck, but there's nothing better)

Subfinder

Nuclei

Credmaster

To name a few.

digiKam was the first Linux application I encountered that was so polished and useful for what it does that I tried to shoe-horn it into any and every DE I experimented with, as well as installing it onto my windows machines under KDE4Win.