SendRecurring - SendRecurring allows you to setup, send, and maintain scheduled email reminders.
Remote Mouse - Turn your smartphone into a wireless touchpad and keyboard now!
Recurrr - Send recurring emails
KDE Connect - Integrate Android with the KDE Desktop
FollowUpThen - The simplest way to schedule an email reminder
Monect - Make the best use of sensors on smart device to control PC, simulate steering wheel, game-pad...