# Sentinelle Tools

27 free tools for federal contractors and small business. No signup, no email gate. Built by Sentinelle Systems LLC in Sterling Virginia (CAGE 18QJ7).

## Tools by category

### Money
- [Mortgage Calculator](https://mortgage.sentinelletools.com): Real monthly payment plus total interest over the loan.
- [Credit Card Payoff](https://creditpayoff.sentinelletools.com): Up to 8 cards. Avalanche vs snowball. See your debt free date.
- [Debt Payoff Strategy](https://debt.sentinelletools.com): Mix cards, student loans, car, mortgage. Get the order.
- [Net Worth Tracker](https://networth.sentinelletools.com): What you own minus what you owe. Stays in your browser.
- [Rental Property Cash Flow](https://rental.sentinelletools.com): Cap rate, cash on cash, monthly cash flow on any property.
- [Federal Salary Calculator](https://fedsalary.sentinelletools.com): 2026 GS base, locality, TSP, take home. Any grade, any step.

### Compliance
- [CMMC L1 Self Assessment](https://cmmc.sentinelletools.com): Score yourself on all 17 practices. Get a remediation list.
- [Privacy Policy + ToS](https://privacy.sentinelletools.com): GDPR and CCPA aware boilerplate for any site.
- [GovCon Alert Service](https://signals.sentinelletools.com): Daily SAM.gov alerts matched to your NAICS and keywords. Free 14 day trial.

### Web
- [robots.txt Generator](https://robots.sentinelletools.com): Block GPTBot, allow ClaudeBot, set your sitemap. Copy paste.
- [SEO Title + Meta](https://seotitle.sentinelletools.com): Five title and meta variants with character counts and SERP preview.
- [QR Code Generator](https://qr.sentinelletools.com): Free QR codes for URLs, text, vCards, WiFi.
- [Link in Bio Builder](https://bio.sentinelletools.com): Linktree style page in 30 seconds. No signup.
- [Social Media Bio Generator](https://socialbio.sentinelletools.com): Five LinkedIn, X, Instagram bios in different tones.
- [Internet Speed Test](https://speedtest.sentinelletools.com): Download, upload, ping, jitter. Runs against a Cloudflare edge near you.

### Writing
- [Readability Scorer](https://readability.sentinelletools.com): Paste any text, get Flesch reading ease and grade level.
- [Cover Letter Generator](https://coverletter.sentinelletools.com): Role, company, three strengths. Get a one shot cover letter.
- [Email Subject Line Tester](https://subject.sentinelletools.com): Score for length, spam triggers, personalization, urgency.
- [Business Name Generator](https://bizname.sentinelletools.com): Brandable names with domain availability hints.

### Design
- [Color Palette Generator](https://palette.sentinelletools.com): Five harmonized colors from any seed. Copy paste hex codes.

### Dev
- [Regex Tester](https://regex.sentinelletools.com): Live regex matching with explain mode and replace.
- [Cron Expression Builder](https://cron.sentinelletools.com): Pick a frequency, get the cron string, see the next 5 fires.
- [SQL Query Builder](https://sql.sentinelletools.com): Visual SELECT, INSERT, UPDATE, DELETE for Postgres, MySQL, SQLite.

### AI
- [AI Meeting Notes](https://meetingnotes.sentinelletools.com): Paste a transcript, get summary, decisions, action items, open questions.
- [AI Paper Summarizer](https://papersummarizer.sentinelletools.com): Paste a research paper, get plain English breakdown with limitations.
- [AI Interview Prep](https://interviewprep.sentinelletools.com): Enter your target role, get 12 likely questions with strong sample answers.
- [AI Market Research](https://marketresearch.sentinelletools.com): Industry plus product in, structured market analysis out. Segments, competitors, pricing.

## Sentinelle services

- [Sentinelle Signals](https://sentinellesignals.com): Daily SAM.gov opportunity alerts for federal contractors. $29 a month.
- [Sentinelle CMMC services](https://www.notion.so/363317667ea78111ad8de0f3069f823c): Monthly retainer compliance work for DoD primes and subs.