I build small, local-first companion apps for hobbies I actually do: flight sims, miniature painting, tabletop RPGs. They run on your own machine, keep your data in one file you own, and usually serve to your phone over wifi, so the thing you need is on the screen beside you instead of buried three clicks into a wiki.
Wizzo is a second-monitor kneeboard for Falcon BMS, DCS World and IL-2 Great Battles. It reads the mission the sim already wrote to disk, pulls the matching charts out of the game install, and turns your loadout into an employment reference, automatically, every time you take a new flight.
For DCS it goes further and draws your flight plan on the sim's own raster aeronautical chart for the terrain, projected with the Transverse Mercator frame each terrain publishes in its own beacon table, accurate to well under a metre. It downloads as a double-click Windows app with no Python needed, and it opens on a tablet over your LAN.
Palette Log is a paint recipe tracker for miniature painters. Recipes are kept per region, so armour, cloth and leather are separate, and a scheme is reusable across a whole army rather than tied to one model. Photograph a mini you already painted and it works backwards, matching each colour against the paints and mixes you actually own.
Generators Without Number is a web app and Foundry VTT module for rolling on Without Number-style tables: worlds, regions, NPCs, ruins. Every result carries a seed, so a world you liked in prep is the same world at the table. Bring your own book data; it is parsed in your browser and never uploaded.
Wizzo is public and MIT licensed. The others are private while they settle. If you'd like early access to one, say hello.
If something here saved you time, you can buy me a coffee.