Open source tools worth checking: May 29, 2026

A short open source tools roundup for Workollab readers. These are the tools worth testing, borrowing from, or keeping on your radar.

Open Source Tools

• IronCalc (OpenAlternative Tools)
  IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.
• Zen (OpenAlternative Tools)
  Free, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.
• ezBookkeeping (OpenAlternative Tools)
  A privacy-first personal finance app with two-level accounts, multi-currency support, AI receipt recognition, and broad data import from formats like GnuCash and Firefly III.