3389 · Open Tools

Open engineering tools from 3389

Small, focused Windows utilities built from real infrastructure and monitoring work — LAN diagnostics, customer support, uptime monitoring, incident response. Portable, auditable, no telemetry. Source published alongside every release under a permissive licence.

  • No installer
  • No admin rights
  • No telemetry
  • Source included
  • SHA-256 verifiable
  • Windows 10 / 11 · x64

NetLens

Portable LAN scanner & host monitor for Windows.

v1.2.0 Native C++20 2.3 MB Single .exe
  • Adapter auto-detect · ICMP + TCP fallback discovery
  • UDP service enrichment (NetBIOS, mDNS, SSDP, SNMP, NTP)
  • Vendor identification + per-vendor port-priority profiles
  • Risk hints · CSV and single-file HTML reports
  • GUI and CLI in the same binary · safe cancellation
Open source Windows x64 No telemetry No admin rights
Download for Windows NetLens.exe · 2.3 MB · portable, no install View on GitHub github.com/3389ro/netlens View source code (ZIP) NetLens-1.2.0-source.zip · 0.74 MB More info, screenshots & changelog →
  • GitHub github.com/3389ro/netlens
  • SHA-256 a593c49123edbb5f5aa004d9603ce683d94102d8c72b7dc6e5ea75e289f76557 .sha256
  • Licence MIT · LICENSE.txt + NOTICE.txt in source ZIP
  • Released 2026-04-12 · Project age 4 months · 5 versions
NetLens scanning a 192.168.12.0/24 office network — 26 online hosts including a MikroTik gateway, Synology NAS, Hikvision cameras, Yealink VoIP and Windows workstations Office scan — 192.168.12.0/24 · 26 online hosts

AI Status Monitor

Desktop console for the official status pages of every major AI provider.

v1.0.0 .NET 10 · WPF 72 MB 14 providers
  • 14 AI providers (OpenAI, Anthropic, Gemini, Azure OpenAI, Mistral, Groq, xAI, …)
  • 7 / 30 / 90-day SLA with interval merging and trend arrows
  • Windows toast + Slack / Teams / Discord webhooks
  • Local REST API on 127.0.0.1:12100 with Swagger UI
  • 8 UI languages · light / NOC-dark themes · sticky widget
Open source Windows x64 No telemetry No AI API keys
Download for Windows AIStatusMonitor.exe · 72 MB · bundled .NET runtime View on GitHub github.com/3389ro/ai-status-monitor View source code (ZIP) AIStatusMonitor-1.0.0-source.zip · 0.12 MB More info, screenshots & changelog →
  • GitHub github.com/3389ro/ai-status-monitor
  • SHA-256 c46de7f3b760d0195001a81c79bcd9bd3055f26dd6c448a84a4dffcd52ee8d02 .sha256
  • Licence MIT · LICENSE.txt + NOTICE.txt in source ZIP
  • Released 2026-05-12 · Project age 2 days · first public release
AI Status Monitor dashboard in dark theme — 14 providers monitored, hero card showing 12 of 14 operational, KPI tiles, provider list with SLA windows and a 90-day sparkline NOC dashboard — 14 providers · dark theme

Built from real operational work

Each utility here started inside a paid engagement — LAN diagnostics on a customer site, uptime monitoring for an AI integration, incident-response tooling for a regulated client. Polishing them for public release is how the team keeps the muscle.

Read the code, ship the binary

Every release ships a complete source snapshot in the ZIP and a verifiable SHA-256 for the binary. Build it with the included script and you get the same bytes we did.

No telemetry, ever

The tools never phone home, never collect analytics, never ship usage data anywhere. The only network traffic is the work you ask them to do. %APPDATA% is the only place state is written.

Portable, no admin needed

Single .exe you can drop on a USB stick or a jump host. No installer, no registry writes, no Run as administrator. Use them on locked-down workstations.

MIT licensed

Read, fork, study or adapt. LICENSE.txt (MIT) and NOTICE.txt (third-party attributions) ship inside every source ZIP. Pull what you need into your own products — commercial use included.

Trademarks & brand names. All third-party names, marks and logos shown on this page or on the tool detail pages — including vendor names visible in NetLens screenshots (derived from the publicly available IEEE OUI registry) and AI provider names referenced by AI Status Monitor (read from each provider’s own public status feed) — are the property of their respective owners. 3389 Software Outsourcing SRL is not affiliated with, sponsored by, endorsed by, or in partnership with any of these companies, products or services. See each tool’s detail page for the full notice.

Like how we build these? We can build bigger systems too.

These tools are a public preview of how the 3389 team thinks — native code where it matters, no telemetry, reproducible builds, real documentation, long-term support. If you have an operational problem that needs the same engineering bar (custom monitoring, integration platforms, infrastructure tools, line-of-business apps), talk to us.

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