I've made 3 that use pi as the primary interaction, with custom tools and scripts.

1. family tree based on wikitree format. Transcribe records, verify/edit, then incorporate them into the tree with full citations and biographies. This one is the big one. It includes a tree browser and best genealogical practices.

2. Pool Math replacement. Log pool chemistry tests to markdown files and suggest the right amount of chemicals to balance.

3. Calorie counter. Log calories to a markdown file, look up foods and amounts in online databases, sync with garmin connect for exercise calories.

All of these are written with AI but also are interacting with pi and telegram, mostly using deepseek v4 flash.