kdeconnect-kde

Moving content between a phone and a computer usually means cables, cloud uploads or emailing files to yourself. KDE Connect removes that friction by letting your devices talk to each other directly over the local network, with TLS encryption and no cables required. The app covers a broad set of everyday tasks: a shared clipboard, notification sync so you can read and reply to Android notifications from the desktop, instant sharing of files and URLs, a virtual touchpad and keyboard, a presentation remote, and remote control of Linux media players. It can also run shell commands on the computer from a phone and read, send and reply to SMS and MMS messages. KDE Connect is aimed at Linux desktop users running Plasma, GNOME or other distributions with Qt 6 support, and pairs with the companion app on Android, iPhone and iPad. It is distributed under the GNU GPL v2 and v3 licenses and is installed from your distribution's package repository. On Windows, the app is available from the Microsoft Store, and the upstream KDE project maintains the source code. (Short version: an open-source tool for phone-to-computer integration.)