Free Developer Tools

Free tools and open-source projects for real estate investors — built in the open, free to use.

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Grandmother House Scorer preview

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Grandmother House Scorer

Score any listing against the holy-grail “grandmother house” deal method: bones, systems, cosmetics, margin math, and a deal pipeline tracker.

CapEx Reserve Planner preview

CapEx Reserve Planner

Turn every major system’s age into a monthly savings number, so the $12,000 roof is funded before it ambushes you.

House-Hack Analyzer preview

House-Hack Analyzer

Price a 2–4 unit house-hack honestly: full PITI, rental income haircuts, and your true monthly cost stacked against your current rent.

Mortgage Payoff Visualizer preview

Mortgage Payoff Visualizer

Drag the extra-payment slider and watch years of mortgage payments get erased, with a gold burn-down chart and your interest saved.

Closing-Day Funds Checklist preview

Closing-Day Funds Checklist

The wire-fraud guard for closing day: hard-stop verification steps, exact cash-to-close math, and the classic fraud tells.

Refinance Break-Even Watcher preview

Refinance Break-Even Watcher

Rates dropped — should you refi? Honest break-even math: monthly savings versus closing costs, framed around how long you’ll keep the loan.

BRRRR Deal Analyzer preview

BRRRR Deal Analyzer

Run the full BRRRR loop on any deal — cash invested, refi proceeds, cash left trapped, and the verdict: true BRRRR or money pit.

House Hack Calculator preview

House Hack Calculator

Buy a multi-unit, live in one: your true out-of-pocket housing cost after rents, and whether the hack beats renting.

Security Deposit Ledger preview

Security Deposit Ledger

Track every tenant’s deposit, the interest you owe, and move-out deductions — with a printable itemized statement.

Closing Cost Estimator preview

Closing Cost Estimator

Every line item of your closing costs in plain English, summed into one cash-to-close number.

Real Estate × Blockchain

Open-source smart-contract templates for bringing property on-chain.

Deed NFT Template preview

Deed NFT Template

ERC-721 template tying a property deed to an NFT, with the recorded deed’s hash anchored on-chain.

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Rent Splitter preview

Rent Splitter

Splits rental income between owners automatically on-chain.

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Syndication Shares preview

Syndication Shares

ERC-20 mini-REIT with on-chain dividend accounting.

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Escrow preview

Escrow

Earnest-money escrow with inspection contingency and arbiter.

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Lease Option preview

Lease Option

Rent-to-own contracts with on-chain rent credits.

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Mortgage Tracker preview

Mortgage Tracker

An immutable on-chain ledger for loan payments.

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