Open-Source Buchhaltungssoftware für Freiberufler, Selbstständige und Vereine. Offline-first, datenschutzfreundlich, GoBD-konform. Made for Germany 🇩🇪

GUI and CLI for the electronic balance sheet (eBilanz)

Lokales Open-Source-Tool fuer Eroeffnungsbilanz, Jahresabschluss und E-Bilanz einer GmbH nach HGB

Unofficial C# Otto download demo

Python port of taxel: CSV-based eBilanz tooling using ERiC via eric-py

Measuring home water use with inductive prox sensor on watermeter / Watergebruik meten met een inductieve prox sensor op de watermeter

📊 Simplify your bookkeeping with RechnungsFee, an open-source solution designed for freelancers and small businesses.

Unofficial C++ Otto download demo

Free, open-source CLI for Germany's mandatory E-Bilanz: fill an Excel template, get a validated HGB-XBRL filing submitted to the Finanzamt via ELSTER/ERiC. Built for small GmbHs priced out of commercial tax software.

Stripe Tax to BOP OSS Converter

Guided German tax return wizard with live refund estimation, Werbungskosten optimizer, Lohnsteuerbescheinigung OCR, ELSTER XML export, and AI result explanations. Web app. English & German.