I am unable to find an alarm or timer indicator for Wingpanel.
Hourglass and Tomato work well, but neither integrate with Wingpanel.
Is this currently available?
You should search for
Here is the ppa and how to install: indicator-remindor
After installing remember to log out and back in, or you can use this command:
sudo killall wingpanel
Then search for remindor or indicator-remindor in applications menu or synapse to start.
It works as an alarm/reminder for ubuntu and ubuntu derivatives including elementary.