GDG Coding Jams
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Community showcase

What the rooms shipped.

Real builds from real GDG chapters. Two hours, one pizza, one prototype. Filter by track or chapter — or scroll until something makes you want to fork it.

All builds

Showing 61–70 of 70

Mood Jar AI
Track 05Solo — New York, NY
Mood Jar AI

An interactive digital mood jar app that transforms daily emotions into preserved, glowing memory notes. Users record their current state of mind to receive instant AI reflections, visual vibe tracking, and mood history visualization directly in the browser.

I was surprised by how a simple visual UI transformation and lightweight client-side state could instantly make emotion-tracking feel so tactile, playful, and engaging.

VibeGuard
Track 09GDG on Campus Concordia University
VibeGuard

VibeGuard detects security issues with vibe coded apps.

How quick we were able to build it.

Nasa project
Track 09egypt
Nasa project

An interactive educational web platform about NASA and space exploration. It features detailed guides on solar system planets, space news, NASA's historical achievements, and user account management, all wrapped in an immersive space-themed design.

I didn't expect how easy it would be to integrate interactive features like live chat and user ratings into a static space web guide. It made the whole site feel like a real live product

ISLE-VIEW-MOLLY
Track 01ISLE-VIEW-MOLLY
ISLE-VIEW-MOLLY

AURADEX is an AI-powered desktop productivity application built with Electron and modern web technologies. It provides an interactive workspace with analytics, project management tools, and AI-assisted features in a single interface. The goal is to help users stay productive while managing projects efficiently.

I expected the hardest part to be building the interface, but integrating multiple features into a smooth desktop experience was the bigger challenge. I also learned that small performance optimizations can significantly improve the user experience.

Immersive Piano Learning
Track 09GDG NYC
Immersive Piano Learning

I made a Yiruma themed piano teacher app with Kyoto river in the background, this app is trying to be a performance level piano teacher, it creates immersive experience with customized ambient. So you see the beauty in piano and music. You can drag the bar to replay and practice key paragraph. In addition, it helps guide beginner to navigate their fingers on keyboard with finger number hints. Also you can at the same time play spontaneous key stokes to jam it up and make it fun:)

I'm surprised to learn how music is programmed, sound font api, midi, mxl all the technical parts of how music interacts with computer. Using adaptive fingering engine, extending to 88 keyboard, adding paddle to replicate resonance and reverb. Beautiful music gets technical and require human craftsmanship and iterations of refinement. With Antigravity, it is possible seeing this being built.

🧊
Track 04GDG on Campus Talladega College
let's cook, literally

I assumed building a real-time kitchen assistant would require a complex video streaming pipeline and file uploads. I was amazed that sending raw webcam frames directly to Gemini 2.5 Flash achieved sub-second, structured feedback loops.

Craft_Faces
Track 09GDG NYC
Craft_Faces

Craft_Faces is a web based live AR mask-wearing application, where you can choose and wear your favorite mask by hand gesture, and snap a shot by voice!

When I decided to implement hand gesture interactions, Antigravity presented two potential approaches: 2D mesh and 3D mesh, not just one method. It clearly explained how each method works, demonstrated the expected visual effects, and outlined the advantages and trade-offs of each option. This helped me make an informed technical decision. This is very helpful and the spec generation is detailed.

Fridge Chef
Track 04GDG NYC
Fridge Chef

Turn the random ingredients in your fridge into a custom recipe and a dreamy, AI-generated photo of the finished dish — all wrapped in a Y2K Dreamcore aesthetic that feels like downloading a rare program in 2003.

How fast vibe-coding tools like Antigravity take a developer from 0 to 1. I was surprised by the level of awareness and detail it displayed after well-engineered prompts.

Finesse
Track 09GDG NYC
Finesse

For the spenders who dread checking their credit card statements at month's end. Buster is a financial tracker that brings awareness to your spending habits. Buster keeps you in check—catching that $6 coffee you buy every morning and highlights how your daily choices impact your financial picture. Stay accountable without the shame.

For a first time gemini user it was fun to test the capabilities in a developer friendly environment. I think that in the ~45 minutes we had, I was able to build a fun MVP and demo that satisfied a big paint point in my life, and potentially others. Looking forward to bringing out the max potential out of Gemini and the Google tools as I try to bring this application to the App Store!

FridgeJam
Track 04GDG on Campus DePauw University
FridgeJam

FridgeJam uses Gemini AI to turn leftovers into personalized recipes! Type ingredients or snap a fridge photo for the Gemini 2.5-Flash model to auto-detect them. Ingredients drop into a physics jar where you pick a custom AI Chef for a tailored meal, playing mini-games and guessing jokes while you wait. Get AI-generated food images, download a PDF, or like to save it to your personal recipe box.

I was surprised by how creative Gemini has become! I prompted Gemini in Antigravity to "go crazy" with a secret feature I won't disclose here, and it delivered one of the absolute coolest parts of the entire project, implementing it entirely from scratch as well!