Open source alternatives to free42
50 open source Utilities apps to use instead, best rated first.
Top picks
- B
Builder.io
LaunchBuilder.io is a visual headless CMS and development platform that lets teams create, manage, and optimize web pages without constant developer involvement. It integrates with any tech stack (React, Next.js, Vue, etc.) and includes AI-powere
- E

Elasticsearch
LaunchElasticsearch is an open-source, RESTful search engine designed for scalability, reliability, and easy management.
- H

Handy
LaunchCross-platform desktop app that transcribes your voice into any text field using a keyboard shortcut, with all processing done locally on your machine.
- H

Hermes Agent
LaunchCross-platform desktop agent from Nous Research that connects to Telegram, Discord, Slack, WhatsApp, and more, with persistent memory, scheduling, and isolated sandboxing.
- I

InfluxDB
LaunchInfluxDB handles high-velocity, high-resolution time series data at scale, built for telemetry, edge devices, IoT, and physical AI workloads.
- K

Kitty
LaunchHigh-performance terminal emulator with GPU acceleration, graphics support, and advanced scripting capabilities for developers and system administrators.
More Utilities apps
About free42

free42
An HP-42S Calculator Simulator
Free42 is a re-implementation of the HP-42S Scientific Programmable Calculator and HP-82240 Printer. It is a complete rewrite, not using any HP code. It does not require an HP-42S ROM image. Even though it contains significant enhancements compared to the original calculator, Free42 remains fully compatible with the HP-42S, both in its user interface and in its ability to run programs written for…
- Price
- Free
- Made by
- Wolfgang Ginolas
- Category
- Utilities
- Website
- thomasokken.com


