Brave
# /etc/apt/sources.list.d/brave-browser-release.list
# get the key with: wget -O /usr/share/keyrings/brave-core.asc https://brave-browser-apt-release.s3.brave.com/brave-core.asc
deb [arch=amd64 signed-by=/usr/share/keyrings/brave-core.asc] https://brave-browser-apt-release.s3.brave.com/ stable main
DBeaver
# /etc/apt/sources.list.d/dbeaver.list
# https://dbeaver.io/download/
# get the key with wget -O /usr/share/keyrings/dbeaver.asc https://dbeaver.io/debs/dbeaver.gpg.key
deb [signed-by=/usr/share/keyrings/dbeaver.asc] https://dbeaver.io/debs/dbeaver-ce /
Grafana
# /etc/apt/sources.list.d/grafana.list
# https://grafana.com/docs/grafana/latest/installation/debian/#install-from-apt-repository
# get the key with: wget -O /usr/share/keyrings/grafana.asc https://apt.grafana.com/gpg.key
deb [signed-by=/usr/share/keyrings/grafana.asc] https://packages.grafana.com/oss/deb stable main
Icinga (Debian and Raspbian)
# /etc/apt/sources.list.d/icinga-raspbian.list
# get the key with: wget -O /usr/share/keyrings/icinga.asc https://packages.icinga.com/icinga.key
deb [arch=armhf signed-by=/usr/share/keyrings/icinga.asc] http://packages.icinga.com/raspbian icinga-bullseye main
deb [arch=amd64,i386 signed-by=/usr/share/keyrings/icinga.asc] http://packages.icinga.com/debian icinga-bullseye main
InfluxDB
# /etc/apt/sources.list.d/influxdb.list
# https://docs.influxdata.com/influxdb/v1.8/introduction/install/
# get the key with: wget -O /usr/share/keyrings/influxdb.asc https://repos.influxdata.com/influxdata-archive.key
deb [signed-by=/usr/share/keyrings/influxdb.asc] https://repos.influxdata.com/debian bullseye stable
MongoDB
# /etc/apt/sources.list.d/mongodb-org-4.4.list
#
# get the key with wget -O /usr/share/keyrings/mongodb.asc https://www.mongodb.org/static/pgp/server-4.4.asc
# Uncomment one:
# deb [ arch=amd64,arm64 signed-by=/usr/share/keyrings/mongodb.asc ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.4 multiverse
# deb [ arch=amd64,arm64 signed-by=/usr/share/keyrings/mongodb.asc ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 multiverse
# deb [ arch=amd64,arm64 signed-by=/usr/share/keyrings/mongodb.asc ] http://repo.mongodb.org/apt/debian buster/mongodb-org/4.4 main
Opera
# /etc/apt/sources.list.d/opera-stable.list
# get the key with: wget -O /usr/share/keyrings/opera.asc https://deb.opera.com/archive.key
deb [signed-by=/usr/share/keyrings/opera.asc] https://deb.opera.com/opera-stable/ stable non-free