WhatsMany - Send personalised WhatsApp messages in bulk
Things - Things is an easy to use task manager.
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
Motion Firefox - All-in-one time management tool in Firefox
Porterhouse - Send mass iMessage and SMS texts from your existing number with a single click!
Taskable - Using multiple work apps leads to tons of context switching, breaking flow and killing productivity.