Music Transfer is a standalone macOS app window with retro CRT terminal aesthetics. It transfers music mp3/aac or flac/alac files from Mac to an Android phone via USB or Wi-Fi. Or any other file.

A tool for practicing sun sights with a sextant — sight reduction runs entirely client-side. Intercept computes the calculated altitude and azimuth using spherical trigonometry.

A minimalistic plain text editor for macOS with a strict no-extras policy: no syntax highlighting, no AI, no autosave. A .txt file written fifty years ago opens today, without conversion, without a subscription, without the original software.

One-click sync to GitHub. Quay is a menu bar app that watches local folders and pushes changes to GitHub over Git. Written in Swift; Git operations shell out to the system git binary.

2D nautical simulation game. Skipper a sailing yacht across the North Sea Traffic Separation Schemes at night.

Local-first research database for digital humanities.

A logbook app for iOS. Sophisticated offline-capable sync for offshore sailors. Add photos, GPX tracks, and GPS positions for passage events. Send digital postcards.