| What it does | Free network diagnostic tools for DNS, IP, email and SSL checks
| Python framework for building and simulating dynamical systems using block diagrams
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| Stage | Not given
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| Based in | IN
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| Pricing model | Freemium
| Open source
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| Pricing | Free plan: All 41 tools with unlimited checks, 3 saved domains with daily monitoring, 7 days of history. Pro plan: $29/month for 50 domains, scans every 6 hours, email, Slack, Telegram and webhook alerts, 12 months of history and API access.
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| Key features | - DNS Lookup - resolve A, AAAA, MX, TXT, NS, CNAME records
- Blacklist Checker - query 7 major DNS blocklists
- SSL/TLS Certificate Checker - verify certificate chain, expiry and protocol support
- Email Deliverability - check SPF, DKIM and DMARC records
- WHOIS Lookup - query domain registration details
- Reverse DNS (PTR) - check IP to hostname resolution
- Port Checker - test common HTTP/HTTPS ports
- BIMI Lookup - query BIMI TXT records
- Domain monitoring with automated scans
- Multi-channel alerts via email, Slack, Telegram and webhooks
| - 30+ solvers including implicit, explicit, and adaptive integrators
- Zero-crossing detection and scheduled events for hybrid systems
- Hot-swappable blocks and solvers during active simulation
- Hierarchical subsystems for modular component design
- MIMO support with multiple input and output ports
- Browser-based visual editor with PathView
- Domain toolboxes for chemical, battery, vehicle, flight, and RF engineering
- Custom blocks through subclassing the base Block class
- Supports continuous-time, discrete-time, and hybrid systems
- FMI integration to wrap Co-Simulation and Model-Exchange FMUs
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| What makes it different | - 41 tools all available free with unlimited checks
- Clear sourcing - every result shows its source and what was not tested
- Live DNS queries from edge servers via DNS-over-HTTPS
- Domain monitoring and alerts with affordable Pro plan at $29/month
| - Readable, scriptable alternative to traditional simulation tools with solver depth
- Full ecosystem including FastSim Rust engine and standalone C code generation
- Minimal runtime dependencies: only numpy, scipy, and matplotlib
- Domain-specific toolboxes for chemical, battery, vehicle, flight, and RF engineering
- MIT license with open source development
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 5 ▲ +1 (up) since last check | 38 ▼ −1 (down) since last check |
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| Trust Flow (Majestic) | 6 | 6 |
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| Citation Flow (Majestic) | 17 | 14 |
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| Referring domains (Majestic) | 6 | 18 |
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The Network Tools