Zac Witte

All the tools you need to maximize your Airbnb revenue

Buy a light on the Bay Bridge for someone you love

Bite-sized lessons to become an analytics expert.

Hand curated content suggestions for social media

A simpler, personal, more accurate mobile weather experience

Give directly to a homeless neighbor on the street

A virus, a drug, and a religion

A new social camera for iPhone

Assemble your community to donate to those in need

Direct giving to SF's homeless for the things they need.

Direct donations to homeless people and neighbors in need

Walk & run to capture your city. Runkeeper meets Foursquare.