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Hacktoberfest 2026 Challenge

This is the official tag for submissions and announcements related to Hacktoberfest Challenges.

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FieldLens: Orchard Vigor Monitoring That a Grower Would Actually Pay For — Sentinel-2 NDVI + Local Gemma

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

FieldLens: Orchard Vigor Monitoring That a Grower Would Actually Pay For — Sentinel-2 NDVI + Local Gemma

2
Comments
5 min read
CiteWise: a local research desk that will not invent a citation

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

CiteWise: a local research desk that will not invent a citation

Comments
4 min read
Will my plants survive my friend? I built her a bodyguard

Hacktoberfest Weekend Challenge: Build for a Friend Submission 🤝

Will my plants survive my friend? I built her a bodyguard

10
Comments 1
7 min read
LedgerShield: Reconcile Confidently. Keep Financial Data Local.

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

LedgerShield: Reconcile Confidently. Keep Financial Data Local.

38
Comments
6 min read
Which trees near me are turning this weekend? Forecasting fall color from 6,650 iNaturalist observations with TabPFN

Hacktoberfest Open-Source AI Challenge Week 1: Touch Grass Submission 🌿

Which trees near me are turning this weekend? Forecasting fall color from 6,650 iNaturalist observations with TabPFN

Comments 1
11 min read
Meridian: The AI Travel Crew That Learns From Your Jet Lag

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

Meridian: The AI Travel Crew That Learns From Your Jet Lag

Comments
7 min read
DocuScan AI: Production-Ready Document Intelligence Engine Powered by Llama 3 & Groq

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

DocuScan AI: Production-Ready Document Intelligence Engine Powered by Llama 3 & Groq

Comments
1 min read
I built an offline invoice sorter for freelancers, then measured whether local inference is actually cheaper

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

I built an offline invoice sorter for freelancers, then measured whether local inference is actually cheaper

Comments
12 min read
Touch Grass - AI outdoor companion

Hacktoberfest Open-Source AI Challenge Week 1: Touch Grass Submission 🌿

Touch Grass - AI outdoor companion

Comments
3 min read
I Built an AI That Tells You to Stop Using AI and Go Outside 🌿

I Built an AI That Tells You to Stop Using AI and Go Outside 🌿

1
Comments
2 min read
Building a landslide rain check for a friend in Pokhara

Building a landslide rain check for a friend in Pokhara

40
Comments 3
5 min read
MLH second week challage

MLH second week challage

2
Comments
1 min read
Clean Air Walk: I asked Gemma when it's safe to touch grass in Delhi NCR

Hacktoberfest Open-Source AI Challenge Week 1: Touch Grass Submission 🌿

Clean Air Walk: I asked Gemma when it's safe to touch grass in Delhi NCR

2
Comments
6 min read
Building Fuenzer Sports: An AI Tournament Prediction Side Hustle Powered by Open-Weight Models

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

Building Fuenzer Sports: An AI Tournament Prediction Side Hustle Powered by Open-Weight Models

6
Comments
4 min read
DocuScan AI: Keeping personal documents to yourself

Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission 💸

DocuScan AI: Keeping personal documents to yourself

Comments
1 min read
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