対応アプリ

• Pidgin http://www.pidgin.im
• Empacy https://wiki.gnome.org/Apps/Empathy

PidgionにTelegram, Matrix, Discord, Slack のアカウントを登録した状態

$ ps -eo rss,pid,args | egrep -i pidgin | grep -v egrep | awk '{sum += $}1 END {print sum}'
93292

$ apt-cache search libpurple | grep -v dbg
bitlbee-common - IRC to other chat networks gateway (common files/docs)
bitlbee-libpurple - IRC to other chat networks gateway (using libpurple)
minbif - IRC-to-other-IM-networks gateway using Pidgin library
minbif-common - IRC-to-other-IM-networks gateway using Pidgin library (common files)
libpurple-bin - multi-protocol instant messaging library - extra utilities
libpurple-dev - multi-protocol instant messaging library - development files
libpurple0 - multi-protocol instant messaging library
pidgin-awayonlock - pidgin plugin to set as away on screensaver activation
pidgin-gnome-keyring - integrates pidgin (and libpurple) with the system keyring
purple-discord - Discord messaging service plugin for libpurple
purple-lurch - XEP-0384 OMEMO Encryption plugin for libpurple
purple-matrix - Matrix plugin for libpurple
purple-mm-sms - libpurple plugin for SMS
purple-rocketchat - Rocket.Chat protocol plugin for libpurple
purple-xmpp-carbons - XMPP XEP-0280: Message Carbons plugin for libpurple
purple-xmpp-http-upload - HTTP File Upload plugin for libpurple
telegram-purple - Purple plugin to support Telegram
telepathy-haze - Telepathy connection manager that uses libpurple
empathy-skype - Skype plugin for libpurple messengers (Empathy-specific files)
pidgin-skype - Skype plugin for libpurple messengers (Pidgin-specific files)
pidgin-skype-common - Skype plugin for libpurple messengers (common files)

※Debian sid amd64の purple-discord 0.9.2020.07.17.git.8fd7ceb-1 はログインしてチャンネルリストの取得，文字列の投稿は可能だがメッセージの取得が出来ない．

• dylex/slack\-libpurple: Slack module for libpurple

$ sudo apt install libpurple-dev
$ git clone https://github.com/dylex/slack-libpurple
$ cd slack-libpurple
$ make
$ make install-userk

Pidginを起動し直したら認識した．

メッセージの送信は出来るがメッセージを受け取れない．

• Pidgin loses incoming messages · Issue \#244 · EionRobb/purple\-discord