Apps similar to Leo Editor include GNU Emacs, which is free and open source. Other options are GNOME Builder, Graviton Editor, PyScripter and NINJA-IDE. You can choose from more than 10 Code Editors like Leo Editor for Windows, Linux, Mac, Chrome OS and self-hosting.
GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. The features of GNU Emacs include:
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Builder is an actively developed Integrated Development Environment for GNOME. It combines integrated support for essential GNOME technologies such as GTK+, GLib, and GNOME APIs with features that any developer will appreciate, like syntax highlighting and snippets.
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Graviton Code Editor is a minimalist, cross-platform editor focused on speed, customization and productivity.
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PyScripter is a free and open-source Python Integrated Development Environment (IDE) created with the ambition to become competitive in functionality with commercial Windows-based IDEs available for other languages.
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NINJA-IDE (from the recursive acronym: "Ninja-IDE Is Not Just Another IDE"), is a cross-platform integrated development environment (IDE). NINJA-IDE runs on Linux/X11, Mac OS X and Windows desktop operating systems, and allows developers to create applications for...
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Caret is a lightweight-but-powerful programmer's editor running as a Chrome Packaged App. Inspired by Sublime and built on top of the Ace editing component, it offers:
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Judge0 IDE is a free and open-source online code editor that allows you to write and execute code from a rich set of languages. It's perfect for anybody who just wants to quickly write and run some code without opening a full-featured IDE on their computer.
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A text editor for GNOME that combines simplicity with power.
Scribes focuses on streamlining your workflow. It does so by ensuring common and repetitive operations are intelligently automated. And also by eliminating factors that prevent you from focusing on your tasks.
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Code Writer is a free text and code editor app for the Windows platform, downloadable from the Windows Store. Use it as a replacement for Notepad and other quick edit apps.
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