Telegram

Telegram is a real-time chat program, similar to instant messages and IRC. Telegram offers a mobile, desktop and web client. You can install the Telegram desktop client using the KDE Discover Software Store or using the command line, which differs based on which GNU/Linux distribution you're using:

Arch/Antergos/Manjaro: sudo pacman -S telegram-desktop
Debian/Ubuntu/Kubuntu/KDE Neon: sudo apt install telegram-desktop
Fedora: sudo dnf install telegram-desktop
Gentoo: sudo emerge telegram-desktop-bin
openSUSE: sudo zypper install telegram-desktop
Flatpak: flatpak install flathub org.telegram.desktop

An active directory of KDE-related Telegram channels is maintained on Telegram at https://t.me/kdechannels. Contact https://t.me/kdechat to add entries to the listing. None of these are officially KDE channels, as KDE does not officially use proprietary communication mediums. Instead, check out KDE Matrix at https://webchat.kde.org or KDE's presence on Freenode (IRC).

Note that a lot of Telegram channels have IRC or Matrix rooms that are bridged to, especially if ran by KDE developers. These channels will typically note so in their descriptions.