Free Tools
- 36.9k installs
- 42k repo stars
- Updated July 27, 2026
- coreyhaines31/marketingskills
free-tools is a skill for planning and evaluating free tools that generate leads and build brand awareness through engineering as marketing.
About
This skill helps plan and evaluate free tools designed to generate leads and build brand awareness. It covers tool ideation based on pain points, validation against search demand, and lead-capture gating strategies. Use it when deciding whether to build a free tool for your product.
- Plan and evaluate free tools as lead-generation and brand-awareness engines
- Framework for validating tool ideas against search demand and build feasibility
- Gating strategies (fully gated, partially gated, ungated) for lead capture
Free Tools by the numbers
- 36,925 all-time installs (skills.sh)
- +3,318 installs in the week ending Jul 28, 2026 (Skillselion tracking)
- Ranked #34 of 1,881 Marketing & SEO skills by installs in the Skillselion catalog
- Security screen: LOW risk (skills.sh audit)
- Data as of Jul 28, 2026 (Skillselion catalog sync)
What free-tools says it does
Lead value × expected leads > build cost + maintenance
npx skills add https://github.com/coreyhaines31/marketingskills --skill free-toolsAdd your badge
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| Installs | 36.9k |
|---|---|
| repo stars | ★ 42k |
| Security audit | 3 / 3 scanners passed |
| Last updated | July 27, 2026 |
| Repository | coreyhaines31/marketingskills ↗ |
Should I build a free calculator for lead generation?
Planning and evaluating free tools for lead generation and brand awareness through engineering as marketing.
Who is it for?
Evaluating whether a free tool is worth building, planning the marketing strategy around it, and setting up lead capture mechanisms.
Skip if: Teams needing downloadable ebook/checklist lead magnets or on-page CRO outside interactive tools.
When should I use this skill?
User asks to plan, evaluate, or build a free calculator, generator, grader, audit tool, or interactive marketing asset.
What you get
Strategic evaluation memo, tool concept outline, SEO/lead-gen rationale, and build recommendation
- tool evaluation memo
- concept brief
- build recommendation
By the numbers
- Skill metadata version 2.0.0
- Covers calculators, graders, audit tools, generators, and interactive lead-gen assets
Files
Free Tool Strategy (Engineering as Marketing)
You are an expert in engineering-as-marketing strategy. Your goal is to help plan and evaluate free tools that generate leads, attract organic traffic, and build brand awareness.
Initial Assessment
Check for product marketing context first: If .agents/product-marketing.md exists (or .claude/product-marketing.md, or the legacy product-marketing-context.md filename, in older setups), read it before asking questions. Use that context and only ask for information not already covered or specific to this task.
Before designing a tool strategy, understand:
1. Business Context - What's the core product? Who is the target audience? What problems do they have?
2. Goals - Lead generation? SEO/traffic? Brand awareness? Product education?
3. Resources - Technical capacity to build? Ongoing maintenance bandwidth? Budget for promotion?
---
Core Principles
1. Solve a Real Problem
- Tool must provide genuine value
- Solves a problem your audience actually has
- Useful even without your main product
2. Adjacent to Core Product
- Related to what you sell
- Natural path from tool to product
- Educates on problem you solve
3. Simple and Focused
- Does one thing well
- Low friction to use
- Immediate value
4. Worth the Investment
- Lead value × expected leads > build cost + maintenance
---
Tool Types Overview
| Type | Examples | Best For |
|---|---|---|
| Calculators | ROI, savings, pricing estimators | Decisions involving numbers |
| Generators | Templates, policies, names | Creating something quickly |
| Analyzers | Website graders, SEO auditors | Evaluating existing work |
| Testers | Meta tag preview, speed tests | Checking if something works |
| Libraries | Icon sets, templates, snippets | Reference material |
| Interactive | Tutorials, playgrounds, quizzes | Learning/understanding |
For detailed tool types and examples: See references/tool-types.md
---
Ideation Framework
Start with Pain Points
1. What problems does your audience Google? - Search query research, common questions
2. What manual processes are tedious? - Spreadsheet tasks, repetitive calculations
3. What do they need before buying your product? - Assessments, planning, comparisons
4. What information do they wish they had? - Data they can't easily access, benchmarks
Validate the Idea
- Search demand: Is there search volume? How competitive?
- Uniqueness: What exists? How can you be 10x better?
- Lead quality: Does this audience match buyers?
- Build feasibility: How complex? Can you scope an MVP?
---
Lead Capture Strategy
Gating Options
| Approach | Pros | Cons |
|---|---|---|
| Fully gated | Maximum capture | Lower usage |
| Partially gated | Balance of both | Common pattern |
| Ungated + optional | Maximum reach | Lower capture |
| Ungated entirely | Pure SEO/brand | No direct leads |
Lead Capture Best Practices
- Value exchange clear: "Get your full report"
- Minimal friction: Email only
- Show preview of what they'll get
- Optional: Segment by asking one qualifying question
---
SEO Considerations
Keyword Strategy
Tool landing page: "[thing] calculator", "[thing] generator", "free [tool type]"
Supporting content: "How to [use case]", "What is [concept]"
Link Building
Free tools attract links because:
- Genuinely useful (people reference them)
- Unique (can't link to just any page)
- Shareable (social amplification)
---
Build vs. Buy
Build Custom
When: Unique concept, core to brand, high strategic value, have dev capacity
Use No-Code Tools
Options: Outgrow, Involve.me, Typeform, Tally, Bubble, Webflow When: Speed to market, limited dev resources, testing concept
Embed Existing
When: Something good exists, white-label available, not core differentiator
---
MVP Scope
Minimum Viable Tool
1. Core functionality only—does the one thing, works reliably 2. Essential UX—clear input, obvious output, mobile works 3. Basic lead capture—email collection, leads go somewhere useful
What to Skip Initially
Account creation, saving results, advanced features, perfect design, every edge case
---
Evaluation Scorecard
Rate each factor 1-5:
| Factor | Score |
|---|---|
| Search demand exists | ___ |
| Audience match to buyers | ___ |
| Uniqueness vs. existing | ___ |
| Natural path to product | ___ |
| Build feasibility | ___ |
| Maintenance burden (inverse) | ___ |
| Link-building potential | ___ |
| Share-worthiness | ___ |
25+: Strong candidate | 15-24: Promising | <15: Reconsider
---
Task-Specific Questions
1. What existing tools does your audience use for workarounds? 2. How do you currently generate leads? 3. What technical resources are available? 4. What's the timeline and budget?
---
Related Skills
- lead-magnets: For downloadable content lead magnets (ebooks, checklists, templates)
- cro: For optimizing the tool's landing page
- seo-audit: For SEO-optimizing the tool
- analytics: For measuring tool usage
- emails: For nurturing leads from the tool
{
"skill_name": "free-tools",
"evals": [
{
"id": 1,
"prompt": "We want to build a free tool to drive leads for our SEO software. We're thinking about an SEO audit tool or a keyword research tool. Which would be better and how should we approach it?",
"expected_output": "Should check for product-marketing.md first. Should apply the evaluation scorecard to compare both tool ideas across dimensions (audience alignment, lead quality, build effort, SEO value, maintenance burden, competitive differentiation). Should reference the tool types from the skill (analyzers, testers). Should recommend the stronger option with rationale. Should discuss lead capture gating strategy (what's free vs what requires email). Should address MVP scope — what's the minimum valuable version. Should provide implementation recommendations.",
"assertions": [
"Checks for product-marketing.md",
"Applies evaluation scorecard to compare options",
"References tool types from the skill",
"Recommends one option with clear rationale",
"Discusses lead capture gating strategy",
"Addresses MVP scope",
"Provides implementation recommendations"
],
"files": []
},
{
"id": 2,
"prompt": "I want to build a free ROI calculator for our HR software. Users input their company size and current processes, and it shows how much time and money they'd save.",
"expected_output": "Should identify this as a calculator tool type. Should apply the ideation framework to validate the concept. Should discuss lead capture strategy: should the basic result be free and detailed report gated? Should address the build vs buy decision. Should recommend MVP scope (what inputs, what outputs, what formula). Should discuss SEO considerations for the tool page. Should reference the evaluation scorecard to score the idea.",
"assertions": [
"Identifies as calculator tool type",
"Applies ideation framework to validate",
"Discusses lead capture gating strategy",
"Addresses build vs buy decision",
"Recommends MVP scope (inputs, outputs, formula)",
"Discusses SEO considerations",
"References evaluation scorecard"
],
"files": []
},
{
"id": 3,
"prompt": "give me some ideas for free tools we could build. we sell email marketing software for e-commerce brands.",
"expected_output": "Should trigger on casual phrasing. Should apply the ideation framework to generate tool ideas relevant to email marketing + e-commerce. Should provide 5-8 ideas across different tool types (calculators, generators, analyzers, testers). Examples: email subject line tester, email deliverability checker, email ROI calculator, email template generator, spam score checker. Should briefly score each against the evaluation dimensions. Should recommend top 2-3 to pursue.",
"assertions": [
"Triggers on casual phrasing",
"Applies ideation framework",
"Generates ideas across multiple tool types",
"Ideas are relevant to email marketing + e-commerce",
"Provides 5-8 ideas",
"Briefly evaluates each idea",
"Recommends top 2-3 to pursue"
],
"files": []
},
{
"id": 4,
"prompt": "We built a free website speed test tool 6 months ago but it's barely getting any traffic. What went wrong and how do we fix it?",
"expected_output": "Should diagnose why the tool isn't getting traffic. Should investigate: SEO strategy for the tool page (target keywords, on-page optimization), distribution strategy (was it launched and forgotten?), competitive landscape (are there dominant free tools already?), tool quality and UX (does it provide unique value?). Should apply the engineering as marketing principles. Should recommend a recovery plan: SEO improvements, content marketing around the tool, product improvements for differentiation.",
"assertions": [
"Diagnoses potential traffic issues",
"Investigates SEO strategy for the tool",
"Assesses competitive landscape",
"Questions unique value proposition",
"Applies engineering as marketing principles",
"Recommends recovery plan with specific actions"
],
"files": []
},
{
"id": 5,
"prompt": "Should we gate our free tool behind an email capture or make it completely free? We want leads but don't want to kill usage.",
"expected_output": "Should apply the lead capture gating strategy framework. Should present the spectrum: fully ungated → partial gating (basic results free, detailed report gated) → fully gated. Should recommend partial gating as the typical best approach — give enough value to demonstrate the tool's worth, gate the detailed/actionable output. Should discuss tradeoffs: ungated = more SEO value and usage, gated = more leads but fewer users. Should provide specific gating recommendations based on tool type.",
"assertions": [
"Applies lead capture gating strategy",
"Presents gating spectrum (ungated to fully gated)",
"Recommends partial gating approach",
"Discusses tradeoffs of each approach",
"Provides specific gating recommendations",
"Addresses SEO impact of gating decisions"
],
"files": []
},
{
"id": 6,
"prompt": "How do I optimize the landing page for our free tool to get more signups? The tool itself is great but nobody finds it.",
"expected_output": "Should recognize this is a landing page conversion optimization task, not a free tool strategy task. Should defer to or cross-reference the cro skill for optimizing the tool's landing page conversion rate. May provide free-tool-specific context (gating strategy, value demonstration) but should make clear that cro is the right skill for page conversion optimization.",
"assertions": [
"Recognizes this as page CRO, not free tool strategy",
"References or defers to cro skill",
"May provide free-tool-specific context",
"Does not attempt full page CRO using free tool strategy patterns"
],
"files": []
}
]
}
Free Tool Types Reference
Detailed guide to each type of marketing tool you can build.
Contents
- Calculators
- Generators
- Analyzers/Auditors
- Testers/Validators
- Libraries/Resources
- Interactive Educational
- Tool Concept Examples by Industry (SaaS product, agency/services, e-commerce, developer tools, finance)
Calculators
Best for: Decisions involving numbers, comparisons, estimates
Examples:
- ROI calculator
- Savings calculator
- Cost comparison tool
- Salary calculator
- Tax estimator
- Pricing estimator
- Compound interest calculator
- Break-even calculator
Why they work:
- Personalized output
- High perceived value
- Share-worthy results
- Clear problem → solution
Implementation tips:
- Keep inputs simple
- Show calculations transparently
- Make results shareable
- Add "powered by" branding
---
Generators
Best for: Creating something useful quickly
Examples:
- Policy generator (privacy, terms)
- Template generator
- Name/tagline generator
- Email subject line generator
- Resume builder
- Color palette generator
- Logo maker
- Contract generator
Why they work:
- Tangible output
- Saves time
- Easily shared
- Repeat usage
Implementation tips:
- Output should be immediately usable
- Allow customization
- Offer download/export options
- Include email gating for premium outputs
---
Analyzers/Auditors
Best for: Evaluating existing work or assets
Examples:
- Website grader
- SEO analyzer
- Email subject tester
- Headline analyzer
- Security checker
- Performance auditor
- Accessibility checker
- Code quality analyzer
Why they work:
- Curiosity-driven
- Personalized insights
- Creates awareness of problems
- Natural lead to solution
Implementation tips:
- Score or grade for gamification
- Benchmark against averages
- Provide actionable recommendations
- Follow up with improvement offers
---
Testers/Validators
Best for: Checking if something works
Examples:
- Meta tag preview
- Email rendering test
- Mobile-friendly test
- Speed test
- DNS checker
- SSL certificate checker
- Redirect checker
- Broken link finder
Why they work:
- Immediate utility
- Bookmark-worthy
- Repeat usage
- Professional necessity
Implementation tips:
- Fast results are essential
- Show pass/fail clearly
- Provide fix instructions
- Integrate with your product where relevant
---
Libraries/Resources
Best for: Reference material
Examples:
- Icon library
- Template library
- Code snippet library
- Example gallery
- Industry directory
- Resource list
- Swipe file collection
- Font pairing tool
Why they work:
- High SEO value
- Ongoing traffic
- Establishes authority
- Linkable asset
Implementation tips:
- Make searchable/filterable
- Allow easy copying/downloading
- Update regularly
- Accept community submissions
---
Interactive Educational
Best for: Learning/understanding
Examples:
- Interactive tutorials
- Code playgrounds
- Visual explainers
- Quizzes/assessments
- Simulators
- Comparison tools
- Decision trees
- Configurators
Why they work:
- Engages deeply
- Demonstrates expertise
- Shareable
- Memory-creating
Implementation tips:
- Make it hands-on
- Show immediate feedback
- Lead to deeper resources
- Capture engaged users
---
Tool Concept Examples by Industry
SaaS Product
- Product ROI calculator
- Competitor comparison tool
- Readiness assessment quiz
- Template library for use case
- Feature configurator
Agency/Services
- Industry benchmark tool
- Project scoping calculator
- Portfolio review tool
- Cost estimator
- Proposal generator
E-commerce
- Product finder quiz
- Comparison tool
- Size/fit calculator
- Savings calculator
- Gift finder
Developer Tools
- Code snippet library
- Testing/preview tool
- Documentation generator
- Interactive tutorials
- API playground
Finance
- Financial calculators
- Investment comparison
- Budget planner
- Tax estimator
- Loan calculator
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Free Tools has 2 known copies in the catalog totaling 53 installs. They canonicalize to this original listing.
- infrasity-labs - 48 installs
- dirnbauer - 5 installs
How it compares
Pick free-tools for interactive web utilities; use cro or popups skills when optimizing existing site conversion elements.
FAQ
What is the free-tools marketing skill for?
free-tools is a coreyhaines31/marketingskills agent skill (version 2.0.0) that evaluates whether free calculators, graders, generators, or audit tools make strategic sense for SEO backlinks and lead capture before engineering starts.
When should developers use free-tools instead of lead-magnets?
free-tools applies to interactive web tools users run in-browser—calculators, graders, audits—while lead-magnets covers downloadable ebooks, checklists, and templates given away for email capture.
Is Free Tools safe to install?
skills.sh reports 3 of 3 security scanners passed. Review the Security Audits panel on this page before installing in production.