#community hackathon ideas

24 ideas across 6 categories · 15 beginner · 8 intermediate · 1 advanced. Sorted by judging fit (editorial estimate).

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Climate
Repair Café Booking and Fix Log
Book a slot to fix a broken item and track what was saved from landfill
Beginner10h1–3
Next.jsFirebaseCharts
17/20
Climate
Neighbourhood Compost Pickup Coordinator
Coordinate who collects kitchen scraps and where compost goes
Beginner10h1–3
Next.jsFirebaseMaps API
17/20
Health
Blood Donor Matcher
Find nearby compatible donors quickly when blood is needed
Intermediate14h2–3
Next.jsPostgresLeaflet
17/20
Web3
Onchain Savings Circle
Run a rotating savings circle with transparent rules in a smart contract
Advanced26h2–3
SolidityFoundryWagmi
17/20
Web3
All-or-Nothing Crowdfund
Backers get automatic refunds if the goal is not reached
Intermediate16h1–2
SolidityFoundryWagmi
17/20
Web3
Community Shop Loyalty Points
Shared loyalty points that work across neighbourhood stores
Beginner10h1–2
SolidityOpenZeppelinNext.js
17/20
Social Good
Missing Pet Finder
Post a lost pet and match it with found-pet sightings nearby
Beginner10h1–2
Next.jsLeafletEmbeddings
17/20
Social Good
Multilingual Community Notice Board
Post a notice once and residents read it in their own language
Beginner10h1–2
Next.jsTranslationTTS
17/20
Social Good
Community Moderation Assistant
Triage reported posts with suggested actions and rule citations
Intermediate14h1–2
LLMNext.jsPostgres
17/20
Social Good
Shelter Bed Availability Board
See which shelters have free beds right now
Intermediate14h2–3
Next.jsSupabaseLeaflet
17/20
Social Good
Community Fridge Map
Find community fridges and see what food is in them now
Beginner8h1–2
LeafletNext.jsSupabase
17/20
Social Good
Community Water Quality Map
Map water test results and complaints by neighbourhood
Intermediate14h2–3
LeafletNext.jsPostgres
17/20
Social Good
Neighbourhood Skill-Share Timebank
Trade hours of help like tutoring or repairs instead of money
Beginner10h2–3
Next.jsSupabase
17/20
Social Good
Crowdsourced Venue Accessibility Ratings
Rate cafés, shops and offices for ramps, toilets and noise levels
Beginner10h1–2
Next.jsLeafletPostgres
17/20
Social Good
Reentry Resource Navigator
Step-by-step plan for ID, housing, jobs and benefits after release
Intermediate14h1–2
Next.jsPostgres
17/20
Climate
Campus Clothing Swap Board
List clothes you no longer wear and swap them with other students
Beginner8h1–3
Next.jsFirebaseTailwind
16/20
Climate
Local Climate Action Finder
Find cleanups, tree plantings and climate events near you this week
Beginner8h1–2
Next.jsLeafletFirebase
16/20
Climate
Neighbourhood Tool Library
Borrow a drill or ladder from a neighbour instead of buying one
Beginner10h1–3
Next.jsFirebaseTailwind
16/20
Productivity
Virtual Coworking Presence Room
Work alongside others in a quiet virtual room with shared goals and timers
Intermediate18h2–3
Socket.IONext.jsPostgres
16/20
Web3
Onchain Event Guestbook
Visitors sign a permanent guestbook at an event
Beginner6h1
SolidityScaffold-ETH
16/20
EdTech
Language Exchange Matcher
Match with native speakers learning your language for practice calls
Beginner10h1–2
Next.jsPostgres
16/20
Social Good
Civic Issue Reporter
Reports potholes and broken lights with photo and location
Intermediate24h2–3
Next.jsVision LLMLeaflet
16/20
Social Good
Campus Lost and Found
Post lost or found items and get matched automatically
Beginner8h1–2
Next.jsEmbeddings
16/20
Social Good
Volunteer Skill Matcher
Matches volunteers’ skills and free hours to NGO tasks
Beginner12h1–3
Next.jsPostgresEmbeddings
15/20

Ideas tagged community

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