I built Chronoscope, because Google Maps won't let you visit 3400 BCE
Interactive historical map aggregating Wikidata and OpenHistoricalMaps into one timeline.

Eight years of research but it's content, not a tool — Atlas Obscura already does this.
History enthusiasts, educators, students
Atlas Obscura · ORBIS Stanford · Ancient World Mapping Center
Interactive historical map aggregating Wikidata and OpenHistoricalMaps into one timeline.
Forty-year dev cleaning up AI-generated code is the real story behind this one.
California neighborhood map with crime and population layers, but AreaVibes already does this better.
9k curated historical events, but Wikipedia + timeline tools already do this better.
Nice stack choice: FastAPI plus htmx keeps the UI thin and server-driven, while dbt with DuckDB/ducklake promises fast, queryable analytics over trade records. If the app actually exposes neat drilldowns (company → goods → counterparties) it will be genuinely useful to researchers, but the landing currently sits behind a Cloudflare verification with no visible demo or docs, so it feels like an early MVP rather than a finished product.
Music theory explorer with sequencer; removes DAW switching friction.