I’m putting together a list of five essential free software programs I’d want on a desert island, but I’m having trouble narrowing down the best options. Which free apps would you choose for productivity, entertainment, communication, or everyday use?
On a real desert island, offline software beats a cloud app every time. On a metaphorical island with reliable internet, communication tools matter much more. I’d build the list around programs that still work when the connection disappears.
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Kiwix: Probably the most island-appropriate choice. It lets you carry offline collections such as Wikipedia, reference material, educational content, and repair guides. The catch is that you must download the content archives beforehand, and they can take a lot of storage.
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VLC: Handles most local music and video files without making you chase codecs. Of course, the program is useless without a preloaded media library, so the external drive matters more than the player.
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LibreOffice: Covers documents, spreadsheets, presentations, notes, inventories, and basic planning. It is the boring choice, but boring software tends to become essential quickly.
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calibre: A good way to organize and read a large ebook collection. I’d load it with novels, textbooks, manuals, cookbooks, and public-domain books rather than relying on a single reader app with a locked-in store.
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KeePassXC: Useful for passwords, recovery codes, private notes, account details, and other information you do not want sitting in an unencrypted text file. Its database works locally without requiring cloud access.
I’d leave messaging out of the core five because every communication app eventually depends on a network and another person having compatible software. If internet access is assumed, I’d swap calibre for Signal. The detail people usually forget is preparation: installers, offline manuals, media, books, Kiwix archives, and backups should all be downloaded before the boat leaves.
Backups beat another media app. My five would be Kiwix, VLC, LibreOffice, GIMP, and Rescuezilla, since a dead system makes the other four useless.
Download the installers, offline manuals, and actual books or media before worrying too much about the final five. A perfect media player is useless if your whole library is still in the cloud.
My picks would be Calibre for ebooks and document conversion, ONLYOFFICE Desktop Editors for writing and spreadsheets, Krita for drawing and image editing, mpv for music and video, and ScummVM for low-spec gaming. That covers practical work and entertainment without needing an internet connection.
I understand @sudosys2’s Rescuezilla pick, but I’d keep a recovery USB and disk image as emergency equipment rather than count it as a daily program. If the rules force it into the five, ScummVM gets cut. The offline content will matter more than minor differences between competing apps anyway.
The operating system is the missing detail. Five perfect Windows programs can be a fairly useless Linux list, and a weak old laptop changes the answer again.
Assuming a modest Windows machine with no dependable connection, I’d take LibreOffice for normal work, SumatraPDF for quickly opening PDFs and ebooks, VLC for media, 7-Zip for unpacking whatever odd archive turns up, and DOSBox-X with a folder of old games. None is glamorous. That is probably a good sign. SumatraPDF is intentionally basic, while DOSBox-X requires games and some setup beforehand.
I’m with @cosmic_admin on keeping recovery tools outside the five. Rescuezilla belongs on a separate bootable USB beside a verified system image. Counting it as daily software feels like counting the fire extinguisher as kitchen equipment.
Portable copies would matter too. If the system needs reinstalling and every installer expects an internet connection, the list has failed before any program opens. Keep the installers, fonts, manuals, save files, and license-free content on at least two drives. Storage is cheap. Rescue boats are apparently less reliable.
A solar charger and a battery that still holds a charge will matter more than the fifth app on this list. Assuming those exist, plus a laptop and phone, I’d favor software that earns its storage space and does not expect to phone home every few days.
My five:
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Kiwix. It keeps the obvious spot. A large offline reference library is far more useful than another productivity suite waiting for someone to request a quarterly sales spreadsheet. I’d load practical material, medical references, repair guides, maps, and language resources rather than downloading all of Wikipedia just to preserve twenty thousand articles about minor television episodes.
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QGIS. This needs preparation, but offline maps you can mark up would be genuinely useful. You could record routes, fishing areas, hazards, water sources, and anything else worth finding again. The catch is that QGIS does not magically provide the map data. Relevant maps, elevation data, and satellite images need to be stored locally before departure.
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Joplin. I’d use it for a journal, inventories, checklists, maintenance records, copied instructions, and an index of where files are stored. Plain text files can do much of this, but searchable notebooks with attachments are easier once the collection grows. It works locally, and the data is much less awkward to move than documents trapped inside some cheerful cloud service demanding a login.
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Syncthing. This is my slightly unglamorous choice. It can move selected folders between the laptop and phone over a local network without internet access. That gives you another usable copy of notes, maps, books, and photographs if one device fails. It is synchronization, not a proper backup, so accidental deletions can spread too. I’d still keep a separate drive disconnected most of the time.
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RetroArch. For entertainment, a collection of older games provides a lot of variety without consuming much storage or requiring a high-end machine. Naturally, the game files, controller profiles, and any required firmware need to be sorted out beforehand. The island is a poor location to discover that your favorite game launches to a black screen because one BIOS file is missing.
I’d leave LibreOffice out unless the island scenario includes actual office work. A lightweight text editor and Joplin cover most writing, lists, and records. I’d probably skip VLC too, which may be heresy here, because common MP3 and MP4 files can usually be handled by the operating system’s player. If the media collection contains obscure formats, then VLC replaces RetroArch.
The bigger preparation issue is testing everything with networking disabled. Log out, turn off Wi-Fi, reboot, and open every program and important file. That catches expired sign-ins, missing fonts, unavailable codecs, cloud-only files, and manuals that turned out to be bookmarks. Software has a charming habit of revealing those details only after the internet disappears.
Skipping VLC because the OS player ‘usually handles MP3 and MP4’ is the one bit I’d correct, @the_shell. On stock Windows that falls apart fast. HEVC video wants a codec that isn’t installed by default, MKV containers get ignored, and half the audio formats people actually hoard don’t play. VLC exists precisely because the built-in players quit the moment a file is slightly unusual. If your media library is even a little varied, VLC or mpv earns its slot no argument.
That said, I think the whole thread is treating file formats as an afterthought, and that’s the trap. Everyone’s arguing about which player or office suite makes the cut, but the thing that actually bites you months later is format lock-in on your own data. Joplin, calibre, KeePassXC, all fine, but check how the data comes back out before you commit. A notes app that stores everything in some proprietary blob is a problem when the app breaks and there’s no download to reinstall from. Plain markdown, plain sqlite, standard epub. Boring wins here, same way @sudosys2 said boring software becomes essential.
My honest five, assuming a modest offline machine:
- mpv over VLC. Same codec coverage, lighter, better on a weak battery. If you want a friendlier interface for someone else on the island, VLC instead.
- LibreOffice, but only because odds are you’ll receive or need to open a.docx or.xlsx eventually, and nothing else opens those cleanly without surprises.
- Kiwix. No disagreement with anyone here. Repair guides and medical references over the full Wikipedia dump.
- SumatraPDF for reading. calibre is great for library management but it’s heavier than it needs to be if you just want to open books. Pick based on whether you’re managing a collection or reading one.
- 7-Zip. @bytecraft is right that this one is easy to forget until some archive shows up in a format nothing else touches.
The part people keep underestimating is fonts and license activation. LibreOffice is fine, but a document built with fonts you don’t have will reflow into garbage, and some ‘free’ tools still want a one-time online activation that quietly fails offline. Test that specific thing before you leave. Open a real document with your actual fonts, on the actual machine, with networking off.
One more realistic expectation: syncing between phone and laptop like @the_shell suggested with Syncthing works, but treat it as convenience, not safety. A cold drive you plug in once a week and unplug is worth more than any live sync when the real failure comes, and the real failure is almost always the disk, not the software.