orpie is a curses-based RPN calculator. The interface is similar to that of modern Hewlett-Packard calculators.
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Category: Productivity
wcalc – command-line calculator
wcalc is a command-line calculator designed to accept all valid mathematical expressions. It’s written in C.
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kalker – calculator with math syntax
Kalker (or “kalk”) is a calculator program. It supports user-defined variables, functions, differentiation, and integration.
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calc – interactive calculator
calc is an interactive calculator which provides for easy large numeric calculations, but can be programmed for complex calculations.
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Modular Calculator – aimed at scientific, engineering or computing work
Modular Calculator is a powerful, scriptable, modular calculator aimed at scientific, engineering or computing work.
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Best Free and Open Source Software – Productivity
Best Free and Open Source Linux Software covering file managers, desktop search engines, mind mapping, notes, collection managers, diary tools, and more.
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Best Free and Open Source Alternatives to Microsoft Calculator
Microsoft Calculator app lets you perform basic arithmetic and scientific calculations. We recommend the best free and open source alternatives.
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Best Free and Open Source Alternatives to Apple Automator
Automator is a utility which lets you create custom workflows to perform both simple and complex tasks. We recommend the best free and open source alternatives.
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Junction – application/browser chooser
Junction is an application/browser chooser. It’s designed to improve your workflow by making it easier to switch applications.
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h-m-m – create mind maps in the terminal
h-m-m is billed as a simple, fast, keyboard-centric tool for working with mind maps.
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Best Free and Open Source Alternatives to Apple Contacts
Apple Contacts is a computerized address book included with iOS and other Apple operating systems. We recommend the best free and open source alternatives.
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Best Free and Open Source Alternatives to Google Contacts
Google Contacts is a contact management service. It’s available on the sidebar of Gmail, a web app, and for Android. We recommend the best free and open source alternatives.
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Best Free and Open Source Alternatives to Apple Reminders
Apple Reminders is a task management program to create lists and set notifications. We recommend the best free and open source alternatives.
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Best Free and Open Source Alternatives to Apple Calendar
Apple Calendar is a personal calendar app supporting multiple accounts, colour coding, events, and calendar invitations. We recommend the best free and open source alternatives.
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GNOME Calendar – simple and attractive calendar
GNOME Calendar is a simple and beautiful calendar application designed to perfectly fit the GNOME desktop.
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Best Free and Open Source Alternatives to Corel MindManager
Corel MindManager is proprietary mind mapping software. What are the best free and open source alternatives?
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36 Excellent GNOME Desktop Extensions (Updated 2022)
Add additional functionality to a GNOME desktop with these great GNOME extensions. This roundup showcases 36 excellent GNOME extensions.
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Best Free and Open Source Alternatives to Google Keep
Google Keep is a note-taking service included as part of the free, web-based Google Docs Editors suite offered by Google. We recommend the best free and open source alternatives.
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Best Free and Open Source Alternatives to Microsoft To Do
Microsoft To Do is a cloud-based task management application. What are the best free and open source alternatives?
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Best Free and Open Source Alternatives to Microsoft Project
Microsoft Project is project management software product, developed and sold by Microsoft. Here’s our recommended free and open source alternatives.
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