Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

The Photographer's Ephemeris - TPE is a tool to help you plan outdoor photography in natural light, especially landscape and urban scenes. It is a map-centric sun, moon and milky way calculator: see how the light will fall on the land, day or night, for any location on earth.

Facebook Local - Discover places to go and events happening near you

SunIZup - SunIZup helps you to know the timings of the various Sunlight phases including the Golden Hour and...

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Sun Seeker App - Projects solar path, solar energy, sunlight exposure and other solar related information onto user-supplied Photo Sphere (spherical photo) images, with a zoom/pan 3D viewer, as well as onto other overhead images such as site plans.