Every Builder Has a Story.

A normal map draws a friendly blue line from A to B. It doesn't mention that block three is a six-lane road with no bike lane and a calm trail runs one street over. So people guess, have one terrifying ride, and quietly return the bike to the garage forever.

BikeSim lets you feel a ride before you take it, across 13 U.S. cities: Washington DC, New York City, Seattle, Portland, San Francisco, Los Angeles, Chicago, Boston, Philadelphia, Pittsburgh, Minneapolis, Denver, and Austin. Pick a start and a destination, see every block scored from calm to hostile on the Level of Traffic Stress scale, and switch to a lowest-stress route that dodges the scary streets. Then ride it virtually in Google Street View or 3D, through Times Square, across the Golden Gate, or up Sunset Boulevard. It began as RideSim DC at the Civic Tech DC hackathon and expanded to more cities after a colleague suggested it.

A lecture is a talking head you can't interrupt. You can pause it, rewind it, play it at 2x, but you can never raise your hand and ask Nikola Tesla what he meant.

AnyScholar is a 3D campus where history's greatest minds teach as AI professors: Tesla on robotics, Ada Lovelace on AI, Marie Curie on physics, and Adam Smith on economics. Hold Space to interrupt mid-sentence and they answer in character, sketch on the board, and pick up where they left off. Hands-on labs and secret stars reward good questions. Grounded in their own writings, so Adam Smith won't be pitching you crypto.

Your network is a thousand people you never talk to. The one person who could unblock you this week is somewhere in there, and neither of you will ever know it.

SuperIntro is a double opt-in coffee chat engine built on a live feed of what a community needs and what it can offer. It matches on complementarity instead of similarity, weighing your needs against someone's offers and theirs against yours, then sends a warm email introduction only when you both say yes. No cold outreach, no collecting connections you never use.

You ship the app, post the link, and hear nothing. A few "looks great!" replies, zero of the honest, specific feedback that would actually make it better.

Feedback Lab runs small events where builders test each other's apps and leave candid, attributed feedback. Sign in, submit what you built, attach it to an event, browse what everyone else made, and trade the detailed notes that move the needle.