Apps
Apps I made, most of them for myself first.
Building now
Most of my time goes to these two. I build both with a team, and you can read the source of both.

Bipe Messenger
iOS, Android
A messenger for Brazil, built on the open Matrix protocol and hosted in Brazil. There is no advertising profile, and verified identity is free, so nobody can pretend to be you. Pix payments are built in. In the end we want an association of member organizations and users to run it, so that no company or government, us included, can change the rules alone.

Starlings Workspace for small firms
macOS, iOS, Android, web
A workspace where every call, message, task and document is filed on the client or project it belongs to. People and AI agents work on the same record, so an agent can read a project's history and draft the follow-up. Calls happen inside Starlings. The host's own device writes the transcript, and Starlings never records audio or video.
House
Small apps I made for my own use, all open source. The Mac menu-bar ones share a package called HouseKit, so they look and behave alike.

Sift Saved links
macOS
Turns open tabs, Reading List, Instagram saves and X bookmarks into a library on your Mac. It keeps the text of every page, finds the themes you keep coming back to, and gives each link a next step. Your own Claude does the sorting.
Needs: Full Disk Access, and Claude Code or an Anthropic API key.

Tessellate Window manager
macOS
Press ⌥Space, then an arrow key, and the focused window moves left, right, to the top or bottom half, or to the center. It covers the small part of a window manager I actually use.
Needs: Accessibility permission.






ESP32
Firmware for small round screens on my desk. Offline where it can be.

tinyarcana Tarot reader
ESP32-S3
A tarot deck that fits on a microcontroller: the twenty-two Major Arcana, a past, present and future spread, and a reading of what the three cards say to each other. Offline, with no account or API.
Needs: A Waveshare ESP32-S3 1.75-inch round AMOLED board.

Products
Bigger projects with their own sites.
Other
Things I built to try an idea.


