A hyper-curated, ever-green directory of calculators, databases, money-makers, research portals, and life-optimizers.
1. Smart-Money Calculators & Planning Tools 🧮
| Tool | What it does |
|---|---|
| IRS Withholding Estimator | Dial-in paycheck withholding |
| SSA Retirement Estimator | Forecast Social Security benefit |
| Compound-Interest Calculator | Visualize growth |
| FINRA Fund Analyzer | Reveal hidden fund fees |
| FinAid Loan-Repayment Calc | Student-loan payoff paths |
| HSA Contribution Limits | Current & catch-up caps |
| BLS Inflation Calculator | Compare dollar buying power |
2. Tax-Filing Portals & Trackers 💸
| Portal | Why it’s useful |
|---|---|
| IRS Direct Pay | Fee-free tax payments |
| Where’s My Refund? | Live refund status |
| Free File Alliance | E-file free (AGI ≤ $79 k) |
| State E-File Gateways | All 50+ portals |
| Taxpayer Advocate | Escalate stuck cases |
3. Business Research & Compliance 🔎
| Tool | Purpose |
|---|---|
| SEC EDGAR | Public-company filings |
| USPTO TESS | Trademark search |
| NAICS Lookup | Industry code finder |
| SBA Size Standards | Verify “small-biz” status |
| OSHA Injury Stats | Safety benchmarking |
| Wayback Machine | Site history snapshots |
4. Grants, Contests & Capital Sources 🏆
| Resource | Audience |
|---|---|
| Grants.gov | Federal grants database |
| SBIR/STTR | Tech seed funding |
| Hello Alice Grants | Rolling small-biz grants |
| FedEx Grant | Annual contest |
| Kiva 0 % Loans | Crowd micro-loans |
| USDA REAP | Rural energy capital |
5. Credit, Identity & Consumer Reports 🛡️
| Link | Benefit |
|---|---|
| AnnualCreditReport.com | Weekly 3-bureau reports |
| OptOutPrescreen | Stop pre-approved offers |
| ChexSystems Report | Banking history |
| LexisNexis Full File | Insurance & public-records |
| CLUE Claims Report | Past auto/home claims |
| Freeze Your Credit | Security freezes |
6. Education & Skill-Upskilling 🎓
| Platform | Highlights |
|---|---|
| SBA Learning Center | Free SMB courses |
| SCORE Mentor | 1-on-1 advice |
| Khan Academy PF | Money lessons |
| Coursera Accounting | Basics series |
| edX Entrepreneurship | HarvardX course |
| IRS Link & Learn | Tax-prep training |
7. Travel & Points Optimization ✈️
| Tool | Why use it |
|---|---|
| State Dept Advisories | Country safety |
| CDC Travel Notices | Health alerts |
| AwardHacker | Best mileage program |
| Seats.aero | Award-seat scanner |
| SeatGuru | Seat maps |
| ITA Matrix | Deep fare search |
| Visa Reciprocity Tool | Required fees/docs |
8. Lifestyle Savings & Deal Trackers 🛒
| Link | Tracks |
|---|---|
| CamelCamelCamel | Amazon price history |
| Rakuten | Cash-back portal |
| BrickSeek | Local clearance |
| GoodRx | Drug prices |
| GasBuddy | Fuel deals |
| Freecycle | Free local items |
| Honey | Auto coupon codes |
9. Sustainability & Ethical Shopping 🌱
| Database | Use-case |
|---|---|
| EWG Skin Deep | Cosmetic safety |
| B-Corp Directory | Impact brands |
| Cradle to Cradle Registry | Circular products |
| EnergyStar Rebates | Appliance incentives |
| HowGood Index | Food sustainability scores |
| TerraCycle Programs | Specialty recycling |
10. Health & Well-Being 🩺
| Resource | Benefit |
|---|---|
| 988 Lifeline | 24/7 crisis help |
| NIH MedlinePlus | Trusted health library |
| MyPlate Planner | Balanced meals |
| Sleep Calculator | Ideal sleep cycles |
| Blue-Light Test | Screen eye-strain check |
| HIPAA Toolkit | Access medical records |
11. Investing & Retirement Data 📈
| Link | Purpose |
|---|---|
| FINRA BrokerCheck | Vet brokers |
| SEC IAPD | RIA ADV filings |
| Morningstar ETF Screener | Filter funds |
| TreasuryDirect I Bonds | Inflation hedge |
| Bogleheads Wiki | Investing primers |
| Portfolio Visualizer | Back-test allocations |
| U.S. Debt Clock | Real-time debt & GDP |
12. Tech, Accessibility & Productivity ⚙️
| Tool | Why it matters |
|---|---|
| WAVE Scanner | WCAG audit |
| Have I Been Pwned? | Breach alerts |
| Down? Is It Just Me? | Site status |
| Notion Budget Template | 1-click tracker |
| Google Takeout | Data backup |
| CC Search | Free media |
| ToS; DR | Summarize TOS |
13. Auctions & Marketplaces 💰
| Platform | Opportunity |
|---|---|
| eBay Seller Hub | Global resale |
| GovPlanet | Surplus military |
| GSA Auctions | Federal surplus |
| Auction.com | REO real estate |
| PropertyRoom | Police seizures |
| StockX | Sneakers / collectibles |
| Flippa | Online businesses |
| HiBid | Estate auctions |
| Catawiki | Art & curios |
| Copart | Salvage vehicles |
14. Side-Hustle & Gig Platforms 🚀
| Platform | Monetize |
|---|---|
| Upwork | Freelance projects |
| Fiverr | Micro gigs |
| TaskRabbit | Local tasks |
| Rover | Pet care |
| Airbnb Hosting | Space rental |
| Turo | Car sharing |
| Etsy Seller | Handmade goods |
| Amazon KDP | Self-publish books |
| Merch by Amazon | POD shirts |
| Gigwalk | Paid micro-audits |
15. Real-Estate Data & Tools 🏘️
| Link | Why it matters |
|---|---|
| Zillow Research | Home-value indices |
| Redfin Data Center | Market trends |
| FHFA HPI | House-price index |
| HUD HomeStore | FHA foreclosures |
| Rentometer | Market rent |
| BiggerPockets Calcs | ROI estimates |
16. Energy & Utility Savings ⚡
| Tool | Benefit |
|---|---|
| DSIRE Incentives | Energy rebates & credits |
| EnergySage Solar | Compare quotes |
| Fuel-Economy Guide | MPG data |
| Home Energy Saver | DIY audit |
| Utility Rate DB | kWh costs |
17. Economic & Demographic Information 📊
| Source | Data |
|---|---|
| FRED | 800 k+ time-series |
| BLS CPI & Jobs | Inflation & labor |
| Census QuickFacts | Local stats |
| BEA Regional GDP | State & industry |
| Statista Free Charts | Visual trends |
| U.S. Debt Clock | Real-time debt & GDP |
18. Career & Salary Tools 💼
| Resource | Use |
|---|---|
| O*NET Online | Skill & outlook |
| CareerOneStop Salary | Wage data |
| Salary.com COLA | Cost-of-living compare |
| Glassdoor Reviews | Pay & culture |
| FutureMe | Email goals to your future self |
| ZapInfo Resume Scanner | Keyword match |
19. Insurance & Risk Tools 🛡️
| Link | Purpose |
|---|---|
| Healthcare.gov Plan Finder | ACA quotes |
| Policygenius | Compare policies |
| FEMA Flood Map | Flood-zone lookup |
| VIN Recall Lookup | Open auto recalls |
| Pet Insurance Review | Compare pet policies |
20. Legal Research & DIY ⚖️
| Resource | What you get |
|---|---|
| Cornell LII | Federal & state statutes |
| Nolo Legal Encyclopedia | Plain-English guides |
| LegalZoom Articles | DIY reference |
| CourtListener | Free court opinions |
| Justia Dockets | Federal litigation tracker |
21. Currency & International Finance 💱
| Tool | Why use it |
|---|---|
| XE Converter | Live FX rates |
| OANDA Historical FX | Back-date conversions |
| Treasury FX Rates | Official US data |
| WorldRemit Fees Checker | Compare remittance costs |
22. Weather & Climate Tools ⛈️
| Link | Insight |
|---|---|
| NOAA Weather.gov | Forecast & alerts |
| National Hurricane Center | Storm tracking |
| Climate Data Online | Historical temps & rainfall |
| Windy.com | Live wind/radar overlays |
| USGS Earthquake Map | Real-time quakes |
23. College Cost & Aid Tools 🎓
| Resource | Purpose |
|---|---|
| FAFSA Online | Federal aid application |
| College Scorecard | Cost & earnings data |
| Net-Price Calculator Center | School-specific net cost |
| Scholarship Owl | Auto-apply scholarships |
| GI Bill Comparison Tool | Military benefits |
24. Charitable Giving & Impact 🎁
| Link | Why it’s handy |
|---|---|
| Charity Navigator | Non-profit ratings |
| GiveWell Top Charities | High-impact giving |
| DAF Rankings | Compare donor-advised funds |
| Guidestar 990 Finder | IRS 990 lookups |
| Benevity Causes | Corporate-match charities |
25. Crypto & Blockchain Tools 🔗
| Tool | Use |
|---|---|
| CoinMarketCap | Market prices & supply |
| Etherscan | Ethereum explorer |
| Bitcoin Whitepaper | Original spec |
| TaxBit Tax Center | Crypto tax calculator |
| Ledger Academy | Security education |
26. Public Safety & Alerts 🚨
| Link | Coverage |
|---|---|
| FEMA Mobile App | Disaster alerts |
| Ready.gov Guides | Emergency plans |
| AMBER Alert RSS | Child alerts |
| USGS Volcano Updates | Eruption notices |
27. Open-Data Portals 🌐
| Resource | Data trove |
|---|---|
| Data.gov | 250 k+ US datasets |
| World Bank Data | Global indicators |
| EU Open Data Portal | Euro-stats |
| Kaggle Datasets | ML-ready CSVs |
| Google Dataset Search | Meta-search |
28. Time, Focus & Productivity 🕰️
| Tool | Boost |
|---|---|
| World Time Buddy | Meeting timezones |
| Pomofocus.io | Pomodoro timer |
| Cold Turkey Blocker | Distraction blocker |
| Toggl Track | Time tracking |
| Fathom AI Notes | Auto meeting summaries |
Disclaimer: External sites are provided for convenience; CPA at Large does not control their content or availability.