Pick - The simplest way to schedule a time to meet
Productivity.so - Shortcuts and hacks for your favorite tools
Meekan - Connecting the world's calendars
Productivity Planner - This package contains a selection of 10 templates that have helped me increase my productivity over the past 5 years.
LettuceMeet - The easiest way to schedule group meetings.
Productivity Tools by Dropbox - Scan, share, collaborate & provide feedback on your ideas