Open-source Android and web apps, Claude skills and self-hosted tools. Small, offline where possible, no accounts.
| FitShare · Android + web | Turns Mi Fitness, Garmin Connect, Strava or Gadgetbridge workouts into transparent Instagram story stickers. Offline, no account. Website · Download APK |
| Monatskasse · Android + web | Pocket-money app and budget book without an account: log expenses, scan receipts, export to Excel. In German. Website · Download APK |
| Passwerk · Web | Source-available generator for EU digital product passports and battery passports: one JSON file per product, passport pages with GS1 QR codes on GitHub Pages. Website: Digitaler Produktpass · Battery passport guide |
| AI Fact Checker · Claude skill | Checks reports, PDFs and AI drafts claim by claim and proves quotes and numbers with a script. |
| Strava Dashboard · Python | Self-hosted Strava dashboard with activity grades, route maps and AI coaching notes. Demo mode, no account needed. |
Banner and avatar: engraving of a falling angel by Gustave Doré (1832–1883), public domain.



