Shipped: the high schoolers whose software left the classroom
A short roundup of student-built apps, AI tools and open-source code that people other than the author actually use, with the caveats attached.
Every student competition has a gallery of projects that were impressive in a gymnasium. Far fewer were ever opened by a stranger. The gap between a demo and a tool is wide, and most of what teenagers build falls into it, which is true of adult software too.
We went looking for the ones that crossed. The rule was simple: a real person outside the team had to be able to use the thing, and we had to be able to confirm it on a page we could open. Several famous examples did not clear that bar, and we left them out. What follows are the ones that did, with notes on what we could and could not verify.
Code other developers import
Start with the clearest case. Million.js is an open-source optimizing compiler that speeds up React components by skipping the usual diffing step and updating the page directly. Its GitHub page lists the license as MIT and the creator as Aiden Bai, with contributors, and at the time of writing the repository has 17.7 thousand stars.
Bai built it while still in school. On the JS Party podcast in June 2023, he described himself as “currently a high school senior up in Washington State” who would study computer science at the University of Washington the following year, and said the project started in June 2021. Stars are not a measure of production use, and we are not claiming any particular company runs it. But a project that strangers file issues against and contribute to is a different category from a science fair poster.
A civics class that shipped
In Denver, students at DSST College View built VoteWise Colorado in their civics class, NPR reported in November 2024. The reasoning was concrete: many students’ parents are naturalized citizens who find voting intimidating, and the English version of Colorado’s voter guide runs 122 pages.
The app includes a chatbot. In NPR’s test, it confirmed a user’s registration status, linked to the official state voting site and explained a ballot measure in plain language. The students split into groups for quality control and technical architecture, worked with their teacher and an industry partner, and built on Playlab, a nonprofit platform that gives teachers access to language models with guardrails. They trained the bot on official documents and aimed for objective answers.
NPR also quoted experts urging users to fact-check any chatbot’s answers, and one computer scientist worried that AI could oversimplify a voter guide. A Virginia Tech professor said the students appeared to have built it responsibly. We include the caveats because they are part of the story: building the thing is the easy half, and the students seem to have understood that.
The algorithm with a second life
Daniel Shen, then a junior at Enloe High School in Cary, North Carolina, won $50,000 at the 2021 Regeneron International Science and Engineering Fair, according to CBS17, for a project titled “Development of an AI-Powered Facial-cue Control Module.” He also took second place for the Regeneron Young Scientist Award.
The detail that made us look twice is what happened next. CBS17 quoted a Regeneron statement saying, “The new algorithm has been adopted by researchers in Sepsis Shock diagnosis and Hurricane predictions.”
We want to be exact here: that claim comes from the fair’s statement as reported by CBS17, and we did not find an independent account from the researchers themselves. We include the project because the attribution is clear, and we flag the gap because accuracy matters more than a tidy paragraph.
What winning an app contest does and does not mean
The Congressional App Challenge, which is coordinated for the U.S. House of Representatives by the Internet Education Foundation, is the country’s best-known student coding prize, and its winners page is a useful index of what teenagers think is worth building.
One 2025 winner is PantryLink. The official description says it “helps people in need connect to food banks in their area and view their stocks.” It was built by four students from Montgomery High School, The Pennington School and Hillsborough High School, and it won New Jersey’s 12th District, hosted by Rep. Bonnie Watson Coleman.
Winning is not the same as adoption. The challenge’s pages describe what an app does, not how many people use it, and we found no usage figures for PantryLink. We list it because the problem it targets is real and checkable. If you run a pantry in New Jersey, you are the data point we are missing.
The test we applied
Three questions sorted these projects. Can a stranger use it today? Is there a page, an official one if possible, that confirms who built it and when? And do we know what we do not know? Million.js passes the first two easily. VoteWise passes with caveats. Shen’s algorithm passes on the strength of a fair’s statement. PantryLink passes on the problem it targets, not on a usage count.
None of this is a ranking, and the list is short on purpose. If you built something that people use, send us the link to the page that proves it.
