Top ACCOUNTING GitHub Repositories & Tools (2026)

Firefly III: a personal finances manager

Fava - web interface for Beancount

Modern plain text accounting. Beancount compatible.

Open-source Tax Guides for AI agents, reviewed by named CPAs/CAs/EAs. 1,000+ Guides across 190+ jurisdictions. MCP server included. Works with Claude, ChatGPT, Cursor.

Ubilling is an open-source billing system designed for Internet service providers (ISPs). It provides tools for managing subscribers, handling payments and creating detailed reports. Ubilling allows control and monitoring of a wide range of network equipment and can be easily extended with custom functionality.

Fast, reliable bookkeeping engine with native GIT SCM support for plain text accounting