Official PPA

qBittorrent 3.3.7   ->  sudo add-apt-repository ppa:qbittorrent-team/qbittorrent-stable
Wireshark  ->  sudo add-apt-repository ppa:wireshark-dev/stable
FreeType  ->  sudo add-apt-repository ppa:no1wantdthisname/ppa
Darktable -> sudo add-apt-repository ppa:pmjdebruijn/darktable-release
Corebird  ->  sudo add-apt-repository ppa:ubuntuhandbook1/corebird
Converseen  ->  sudo add-apt-repository ppa:ubuntuhandbook1/apps
OpenShot  ->  sudo add-apt-repository ppa:openshot.developers/ppa
FocusWriter  ->  sudo add-apt-repository ppa:gottcode/gcppa
PyCharm  ->  sudo add-apt-repository ppa:mystic-mirage/pycharm
DVDStyler  ->  sudo add-apt-repository ppa:ubuntuhandbook1/dvdstyler
Shotwell  ->  sudo add-apt-repository ppa:yg-jensge/shotwell
Rhythmbox  ->  sudo add-apt-repository ppa:fossfreedom/rhythmbox
Nvidia driver  ->  sudo add-apt-repository ppa:graphics-drivers/ppa
StepMania  ->  sudo add-apt-repository ppa:ubuntuhandbook1/stepmania
DigiKam  ->  sudo add-apt-repository ppa:philip5/extra
LibreOffice -> sudo add-apt-repository ppa:libreoffice/ppa
Deluge  ->  sudo add-apt-repository ppa:deluge-team/ppa
Gradio  ->  sudo add-apt-repository ppa:haecker-felix/gradio-daily
Battery Monitor  ->  sudo add-apt-repository ppa:maateen/battery-monitor
MPV  ->  sudo add-apt-repository ppa:mc3man/mpv-tests
GIMP  ->  sudo add-apt-repository ppa:otto-kesselgulasch/gimp
VLC media player  ->  sudo add-apt-repository ppa:nicola-onorata/desktop
Kodi  ->  sudo add-apt-repository ppa:team-xbmc/ppa
MuPD  ->  sudo add-apt-repository ppa:ubuntuhandbook1/apps
KeePass2  ->  sudo add-apt-repository ppa:eugenesan/ppa
XiX Music Player  ->  sudo add-apt-repository ppa:noobslab/apps