NaviMark
Coming soonMarine navigation
A chartplotter built on official S-57 electronic navigational charts, with planning and underway modes. Its chart engine is validated against GDAL.
werkswinkel (n.) — Dutch, “workshop”
Native, local-first apps, connected securely across every platform.
An independent software company in Singapore. We use agentic tooling to build native desktop and mobile apps that keep your data on your devices, and connect them directly peer to peer or through encrypted store-and-forward.
On the bench
Updated October 2026A plain register of what we make and where each piece stands.
| Product | For | What it does | Status |
|---|---|---|---|
| sumibosumibo.app | Individuals and teams who keep their work in plain text | Local-first org-mode manager: plain .org files in, live agendas, dashboards and search out. |
Live · v1.9.0 |
| CryptoPeercryptopeer.net | Every Werkswinkel app, and developers building their own | Our cross-platform, cryptographically secure stack that connects our local-first apps: direct P2P transport, libp2p for Dart/Flutter, encrypted store-and-forward (Ricochet). Dart, Go, TypeScript. | Open source |
Coming off the bench
Ask for an early lookTwo products in late development.
Choreo
Coming soonAgent automation · Desktop
Local-first automations and AI assistants on your desktop. Build workflows on a visual canvas or describe them in words, and run them against local or hosted models.
How we build
Every app runs natively on your device and keeps its data there. CryptoPeer is the shared layer that connects them.
Apps
sumibo
NaviMark
Choreo
On device
Local data store: works offline, your data stays yours
Connect
CryptoPeer: keys, Noise-encrypted sessions, Dart · Go · TypeScript
Transport
Direct peer to peer
Encrypted store-and-forward
Native first
Real desktop and mobile apps, built for each platform. Fast, offline-capable, at home on the device.
Local-first
Your data lives on your devices, and the app works without a server. The cloud is optional.
Securely connected
Apps talk directly peer to peer, or through encrypted store-and-forward. Every peer is identified by its own key.
Built with agents
We use agentic tooling throughout development, so a small team can ship and maintain native apps across platforms.
People
Stephan February
Founder & Director
Stephan has spent almost 40 years building software and leading teams across a wide range of industries. He came up in the dial-up era, when peer-to-peer networking looked like the future of the internet. That promise faded as the industry moved to virtualised services in data centres, then grid computing, then the cloud. Stephan founded Werkswinkel to rebalance the scales: native, local-first software, connected peer to peer, as a practical alternative to the dominant platform model. Away from the keyboard, he's an old salt who'd rather be sailing.
Contact
Partnerships, early access to NaviMark or Choreo, or questions about CryptoPeer: one inbox reaches us.
Email ushello@werkswinkel.net
Registered office
160 Robinson Road#14-04 Singapore Business Federation Centre
Singapore 068914
Company
Werkswinkel Pte Ltd · UEN 202139648Z