14. Calendly
Two-way Google calendar sync so you're never double
booked. Your invitees can easily add scheduled events to
their Google, Outlook or iCal calendars.
17. IFTTT
IFTTT will enable
you to connect 2
services so that,
when something
happens with one
service, it triggers
another
Someone tags me
in FB, add that
photo to my
Dropbox