Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications.
Coffee Chats - Beautiful one-page sites that sync to your calendar to easily schedule chats. Plus, Coffee Chats connects with Stripe so you can easily charge for chats turning Coffee Chats into your all-in-one site, booking, and payments solution.
fitbit - The Fitbit mobile app is for people who use Fitbit fitness trackers to keep track of their activity goals, food plans, and other fitness related things. Read more about fitbit.
TidyCal - Optimize your schedule with custom booking pages and calendar integrations
Strava - The #1 app for runners and cyclists