Free & open-source tools

Free personal and small-business accounting software.

Self-hosted personal finance manager.

Open-source envelope budgeting app.

Open-source personal finance & wealth tracker.

Free easy personal accounting.

Library for quantitative finance.

Python backtesting library for trading strategies.

Pythonic algorithmic trading library.

Open-source investment research platform.

Free crypto trading bot in Python.

Charting platform with free tier.

Open-source Ethereum wallet & dApp browser.

Lightweight Bitcoin wallet.

Bitcoin wallet focused on security and privacy.