It's a non-linear note taking app that allows smart linking and is made as a second brain.
It makes use of the Zettelkasten system, where, in theory, you make notes of everything and categorize it.
Over time, you offload your brain and make it free for more productive stuff.
Logseq is often considered as a FOSS alternative to Obsidian.
Because you asked about "apps", people are replying with mobile apps. I think you wanted to write "programs" considering the community. Maybe you should edit this
LibreWolf as my browser (it's a more secure and private version of Firefox, comes with a pre-installed adblocker and removes all the unnecessary junk) (Flatpak) with some of the following extensions:
Server-Status (GitHub) shows information about a web server like country/region (via local GeoIP database lookup), SSL certificate information and more. Good open source alternative to Flagfox.
Ptyxis (Flatpak) as my terminal. It's optimized for containers (e.g. distrobox). foot is a pretty good alternative if you want something more minimalistic and don't care about containers. There are countless other good options like Kitty, Alacritty, Konsole, WezTerm and many others.
Bitwarden for syncing my password database with my self-hosted Vaultwarden server (also works with their public cloud syncing option). Use KeePassXC if you prefer something entirely local.
LocalSend for sharing files on the local network (basically works like AirDrop) (also works over NetBird or Tailscale btw)
NetBird for creating a flat VPN network between my devices
KDE Connect for better integration with my phone. Also works over NetBird btw. Check out GSConnect if you're on GNOME.
KRunner for quickly finding files or applications (Ulauncher for other desktops, rofi for window managers)
I don't know about you specifically, but I'm surprised how many people haven't heard of Krita, a FOSS image editing app with an optional AI Image Generation plugin.
EDIT: realized this was for desktop, so removed the original list of mostly android apps. Here's my go to desktop apps:
Lollypop - music player Invoiceninja - open source invoicing service Meld - file/folder comparison Librewolf - hardened Firefox Joplin - notes QEMU/Virt-Manager - virtualization for that one windows app you still need KeepassXC - password management Element-desktop - Matrix client Gparted - no fuss partition management Lutris - game launcher that works with epic games (among many others) PDFarranger - best PDF management I've found on Linux
Soundconverter - easy to use file converter Restic - backups Fdupes - duplicate file finder Freetube - privacy respecting YouTube client Paperless-ngx - very well built electronic document storage. Must be run as a server.
They are called "programs", not "apps". The word "app" was created for the iPhone and originally meant a "mini" slimmed down application meant for mobile devices, not a catch-all term for any user program running on a CPU.
Emacs is an app platform in and of itself, and the vanilla installation comes with dozens of its own apps pre-installed. Like how web apps are all programmed in JavaScript, Emacs apps are all programmed in Lisp. All Emacs apps are scriptable and composable in Lisp. Unlike on the web, Emacs encourages you to script your apps to automate things yourself.
Emacs apps are all text based, so they all work equally well in both the GUI and the terminal.
Emacs comes with the following apps pre-installed:
a text editor for both prose and computer code
note taking and organizer called Org-mode (sort of like Obsidian, or Logseq)
a file browser and batch file renamer called Dired
a CLI console and terminal emulator
a terminal multiplexer (sort-of like "Tmux")
a process manager (sort-of like "Htop")
a simple HTML-only web browser
man-page and info page browser
a wrapper around the Grep and Find CLI tools
a wrapper around SSH called "Tramp"
e-mail client
IRC client
revion control system, including a Git porcelain called "Magit"
Analogous to the Krita post, I am surprised nobody seems to know KolourPaint. It's similar to MS paint. I use it, when I need to make a quick sketch, whiteboard style, e.g. when sharing my screen with a coworker.
Otherwise, I really must have Dolphin and Okular.
I love dolphin's split mode (quickly toggled with F3) and its ability to seamlessly navigate all kinds of protocols for my NAS, webdav for nextcloud storage, MTP for the phone...
Okular has annotations which have been super useful to me. And it's so easy to switch between viewing single page, two-page and multi-page. Which is great for skimming text documents and presentations. The auto reload ability is great when iterating on a document (e.g. latex doc or matplotlib chart).
Otherwise, of course firefox and thunderbird, not much to say here Please don't use chrome. It's market share makes Google the de-facto owner of www technology. But I guess I'd be preaching to the choir here.
I use CoreCtrl to fix my GPU's atrocious fan curve, which is a necessity since normally it overheats to high hell. With CoreCtrl, I have a nice fan curve that makes my GPU rarely, if ever, run hotter than 70°C.
An web browser. 99 percent of my mobile activities are done in Firefox. I have Organic Maps for routing, a local mobile payment app and a local sharing electric sooter app.
Cherrytree; nominally for making hierarchical lists but you can basically use it as a wiki for your entire life. You can theme it yourself too, if you think it looks too retro out of the box.
Syncthing, for keeping files synced between devices without having to use a server.
Qbittorrent, for getting files you need. Remember to install search plugins.
KeepassXC. Password manager (local, not on a server, use in combination with Syncthing).
Convertall, for unit conversions.
Calibre, for managing an ebook library, converting formats, removing DRM, transferring to ereader etc.
Rhythmbox, for music library, podcasts, internet radio.
Shotwell, for photo and video library. Easy to use, supports tags (metadata written to image files).
GIMP, for image manipulation. It's extremely versatile, comprehensive and versatile. 3.0 is due out soon and will include non-destructive layer effects. Heavyweight piece of software, so expect a learning curve.
Ardour, for music production. Heavyweight, steep learning curve.
Flowblade for video production. Lightweight, easy to learn.
Libreoffice, desktop publishing.
Librewolf; privacy-focussed web browser.
Thunderbird; highly organisable email client.
Freetube, for watching youtube videos without all the ads and tracking. Local subscriptions and playlists, which you can export to use with Newpipe on Android. Also lets you download video and audio.
If you like the terminal also add:
ranger; file manager
newsboat; RSS feed reader
yt-dl; download videos from youtube and many other sites ;)
w3m; command line web browser. I like to use this in combination with newsboat.
I mostly use terminal unironically.
Duf (to check system storage)
Youtube-tui (written in rust tui for youtube)
Btop (for system management)
Iftop (see where my pc is calling to)
Tuptime (has full system uptime from install to now. It just for fun to see how long my system has been alive)
Ive also gotten into atuin to find command i used and cant remember the command.
I use XSane and TheGimp to scan and edit my paintings, Firefox with privacy extensions to browse, VLC to play videos, Gnome Mahjongg to waste time playing. I used to use Resolve to edit videos, I'll soon start using Kdenlive. As a visual artist I have a thing for film emulation that Kdenlive can't do, but it's something I'll have to leave behind.
For all of my physical Linux machines - Cockpit and Cockpit-File Sharing plugin.
Desktop
Thunderbird
Firefox
Vivaldi
Gnome
Chromium
I use Firefox, wife uses Chromium and My WFH job I use Chrome. Vivaldi is a backup browser, I've been messing around with.
QEMU/LibVirtd - So I can run a Windows VM for my old Canon Lide 60 scanner which scans clearly there, otherwise in Linux, it's contrasted super grey for some reason.
Kopia-UI - Backup system which supports NFS Shares - set and forget type of setup.
VLC - Need I say more? Lol
OnlyOffice - Better aesthetically IMHO than LibreOffice
PDF Arranger - Works well to re-arrange pages or rotate them after scanning them in. (I self host Sterling PDF and will probably switch to that later)
Someone already mentioned Logseq, but I'm really enjoying Obsidian for my note taking needs. It's similar, but I have found Obsidian to be very nice. Not FOSS, but I really like what the devs are doing.
There's no doubt there are a great variety of Linux packages in use.
Recently I did a CD install of Debian 12 (Bookworm) desktop with
Gnome, which loads a bunch of stuff over the Net. Here are extra
packages that I installed manually. The first set is used by and with
an automated configuration script that I wrote, so they have to come
in to begin with.
Title
Description
Purpose
info
Gnu info processor
"Config"
curl
Command line tool for transferring data with URL syntax
"Config"
dbus-x11
Simple interprocess messaging system (X11 deps)
"Config"
emacs
Editor
"Config"
gconf2
GNOME configuration database system (support tools)
"Config"
mc
Midnight Commander - a powerful file manager
"Config"
python3-iniparse
Access and modify configuration data in INI files
"Config"
python-lxml-doc
Python XML documentation
"Config"
python3-lxml
Pythonic binding for the libxml2 and libxslt libraries
"Config"
sakura
Simple but powerful libvte-based terminal emulator
"Config"
Title
Description
Purpose
"apcupsd"
"APC UPS Power Management"
"Monitor"
"artha"
"Handy off-line thesaurus based on WordNet"
"Utils"
"backintime"
"Simple backup/snapshot system"
"Utils"
"brasero"
"CD/DVD burning application for GNOME"
"Utils"
"bwm-ng"
"Small and simple console-based bandwidth monitor"
"Monitor"
"ccze"
"Robust, modular log coloriser"
"Utils"
"certbot"
"Automatically configure HTTPS using Let's Encrypt "
"Utils"
"claws-mail-dillo-viewer"
"HTML viewer plugin for Claws Mail using Dillo"
"Mail"
"claws-mail-feeds-reader"
"Feeds (RSS/atom) reader plugin for claws mail"
"Mail"
"claws-mail-plugins"
"Claws mail"
"Mail"
"claws-mail-spam-report"
"Spam reporting plugin for claws mail"
"Mail"
"cmake"
"Cross-platform, open-source make system"
"Retroshare"
"conky-all"
"Highly configurable system monitor"
"Monitor"
"copyq"
"Advanced clipboard manager with editing and scripting features"
"Utils"
"cups"
"Common UNIX Printing System(tm) - PPD/driver support, web interface "
"Utils"
"dcraw"
"Decode raw digital camera images"
"Photo"
"devilspie"
"Automatically resize windows"
"Utils"
"dict"
"Dictionary client/server and a selection of dictionaries, too"
"Utils"
"dictd"
"Dictionary server"
"Utils"
"diction"
"Utilities to help with style and diction"
"Utils"
"exiv2"
"EXIF/IPTC photo metadata manipulation tool"
"Photo"
"festival"
"General multi-lingual speech synthesis system"
"Utils"
"ftp"
"Classical file transfer client"
"Utils"
"gedit"
"Popular text editor for the GNOME desktop environment"
"Editor"
"gimp"
"GNU Image Manipulation Program"
"Photo"
"git"
"Fast, scalable, distributed revision control system"
"Utils"
"gnome-audio"
"Audio files for GNOME"
"Utils"
"gnome-extra-icons"
"Optional gnome icons"
"Utils"
"gnucash"
"Personal bookkeeping and finance"
"App"
"golang"
"Go programming language compiler"
"yamn"
"hplip"
"HP Linux Printing and Imaging System (HPLIP)"
"Utils"
"hplip-gui"
"HP Linux Printing and Imaging - GUI utilities (Qt-based)"
"Graphical frontend for Scanner Access Now Easy (SANE)"
"Photo"
"zbar-tools"
"Bar Code Scanner and Decoder"
"Photo"
"zip"
"Archiver for .zip files"
"Utils"
Here are third-party packages I admire. These are not available in
Debian repositories although some provide Debian-compatible
repositories of their own.
Tor Browser Bundle: Anonymizing Network Browser
This is available from https://dist.torproject.org/torbrowser/ as a tarball. This should be unpacked and the whole tor-browser_en-US directory moved to the ~user folder. This is so that the browser can auto-update at user authority as the need arises.
RetroShare: Secure Communications with Friends
This has its own Debian-compatible repository.
metar: A Package to Parse METAR Coded Weather Reports
weeWX: Open source software for backyard weather stations.
From http://weewx.com/docs/debian.htm. Although a Debian package exists, doing any development practically requires that all the code be in user-space, so don't install the package. Download it instead.
OpenBSD user, in no particular order, definitely missing some stuff: pdksh (OpenBSD) or oksh (Linux/MacOS), su, unix/posix utils (man (most important), find (second most important), apropos, awk, grep, df, du, dd, ed, etc), mg, openssh, got, heirloom-doctools/troff, bc-gh (bc calculator with a bunch of extensions), xclip, xdotool, xeyes (very important), yt-dlp (youtube-dl seems dead these days), some C compiler (clang/gcc), httpd, opensmtp, ffmpeg, libressl/openssl, pf, tmux (I prefer to use my window manager, but if I'm in tty or need to retain a shell session, tmux is useful), ping, ifconfig, traceroute, netstat, nc/netcat, unwind (or other dns server like unbound)
Not necessarily unheard of but Floorp has been pretty great for work. I think all of the other applications I use are well known within their respective niche (e.g JOSM)
I really like Lunatask. It's a task/habit management app kind of like Todoist, but it works better for me personally. The premium version is quite expensive, but the free one is quite okay to work with. And it's still in development so a lot of features are missing (you can't set a time for a task for example which I find ridiculous).
Also Ghostwriter, it's a really nice minimalistic markdown editor. I wish it was a bit more customizable but I guess I could try emacs for that.
Any flavor of vi, Gnu Screen, lrzsz, bash with the usual cli tools (awk, sed, grep, tail, head, rev, cat, tac, and recently jq and yq). Also openssh client. Some flavor of netcat is also crazy useful too. This is a good home for me to do my thing.
https://www.byobu.org/ can eschew both screen and tmux
Mosh (the mobile SSH client, not linking here) if installing it on the remote server is an option
Apparently people still believe that floorp is proprietary. That's not true, some of it's components went closed-source for a while to switch licenses. Now it's back to being open-source