Shapr - A completely free way to build your professional network.
SimPhy - Interactive 2D & 3D Physics simulation software
Event Hunt - Startups and Tech Events Curated By Locals
Khan Academy - Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.
GetReal - Meet new people, in person
Physical Web - Walk up and use anything