01.Add the remote
flatpak remote-add --if-not-exists tuna-os https://tunaos.org/flatpak/tuna-os.flatpakrepoOr download tuna-os.flatpakrepo and open it with GNOME Software.
02.Available apps
Each app has an install page with its flatpakref and terminal commands.
Letters
Pure Rust GTK4 word processor — DOCX, ODT, Markdown, PDF export.
org.tunaos.letters
Tables
Pure Rust GTK4 spreadsheet — 83 Excel-compatible functions.
org.tunaos.tables
Decks
Pure Rust GTK4 presentation app — native canvas editing.
org.tunaos.decks
Mariner
GNOME Files alternative — typeahead, dual-pane, Quick Look, full-text search.
org.tunaos.mariner
Tavern
Homebrew client for Linux — GTK 4 + Libadwaita.
org.tunaos.tavern
BlueShell
Container-native terminal for GNOME — the Ghostty engine, the Ptyxis experience.
org.tunaos.BlueShell
Ghostty
The upstream terminal, republished here unmodified and rebuilt weekly.
com.mitchellh.ghostty
bootc-installer
Graphical OS installer for bootc-based systems.
org.bootcinstaller.Installer
03.Install an app
flatpak install tuna-os org.tunaos.lettersReplace org.tunaos.letters with any app ID above. The office suite is built from tuna-os/gtk-office-suite.