Apps to Automatic Indentation

VSCodium is a community-driven, freely licensed distribution of Microsoft's VS Code editor. It removes proprietary telemetry and tracking, providing a truly open-source alternative for developers who prioritize privacy and freedom.

MadEdit is a discontinued, cross-platform text and hex editor designed with developers in mind. It offers syntax highlighting, a hex editing mode, and various customization options within a lightweight, tabbed interface. While no longer maintained, it provided a range of features useful for coding and binary file manipulation.

Scratch is a powerful yet lightweight text editor designed for developers and anyone working with code or plain text. It offers automatic saving, syntax highlighting, and a range of features to boost productivity, all within a customizable and extensible interface.

CotEditor is a free and open-source text editor designed specifically for macOS. It offers a clean and intuitive interface, making it a lightweight yet powerful tool for plain text editing, coding, and more.

SynWrite is a comprehensive and free source code editor for Windows, serving as an excellent Notepad replacement with robust features for various programming and web development tasks. It's designed for performance and extendibility, making it suitable for both novice and experienced developers.

Scribes is a free and open-source minimalist text editor designed for programmers and writers who value simplicity and efficiency. It provides a clean interface with essential features like syntax highlighting, autocompletion, and extensibility through plugins, making it a lightweight yet powerful tool for various coding and writing tasks.

Textadept is a powerful, free, and open-source text editor designed for programmers. Focusing on speed and extensibility, it offers a minimalist interface while providing robust features like syntax highlighting, code formatting, and a built-in terminal, all heavily customizable through Lua scripting.

Orwell Dev-C++ is a free, portable, and lightweight Integrated Development Environment (IDE) specifically designed for C and C++ programming. It provides a comprehensive set of tools including a compiler, debugger, and code editor, making it an accessible option for beginners and experienced developers alike. Its portability allows developers to carry their development environment on a USB drive.

Programmer's Notepad is a fast and lightweight text editor designed specifically for programmers and developers. It offers extensive syntax highlighting for numerous programming languages, a powerful search and replace engine with regular expression support, and a highly customizable environment. Ideal for those seeking a free, open-source, and portable code editing solution.

MonoDevelop, now integrated into Xamarin Studio, is a versatile open-source integrated development environment supporting multiple languages and platforms, including C#, F#, .NET, and web development with extensive debugging capabilities.

IDLE (Integrated DeveLopment Environment) is the standard IDE that comes bundled with the Python programming language. It provides a simple and user-friendly environment for writing, running, and debugging Python code, making it an excellent choice for beginners and casual development tasks.

Bluefish is a powerful yet lightweight code editor designed for web developers and programmers. It offers a wide array of features for HTML, CSS, JavaScript, PHP, and many other programming languages, focusing on efficiency and ease of use for building dynamic websites and applications.

SciTE is a free and open-source text and code editor built on the SCIntilla editing component. It's designed to be a lightweight yet powerful tool for programmers and web developers, offering syntax highlighting, code folding, autocompletion, and extensibility across multiple platforms.

Kate, the KDE Advanced Text Editor, is a powerful yet lightweight text editor popular among developers and advanced users. Offering robust features like syntax highlighting, built-in terminal, extensibility via plugins, and comprehensive customization options, Kate caters to a wide range of text editing and coding tasks across platforms.

GNU nano is a user-friendly command-line text editor widely used on Unix-like systems. Known for its simplicity and quick startup, it provides basic editing functionalities for configuration files, scripts, and general text manipulation directly within the terminal environment.

GNU Emacs is a highly extensible and customizable text editor, renowed for its powerful features and ability to serve as a complete development environment. It is based on the Emacs Lisp programming language, allowing for deep customization and a vast ecosystem of packages.

Notepad2 is a free and open-source text editor for Windows known for its lightweight nature, portability, and rich feature set including syntax highlighting for numerous programming languages, code folding, and advanced search and replace functionalities. It offers a highly customizable interface and is ideal for developers and power users seeking a capable alternative to the standard Notepad.

Notepad2-mod is a powerful, yet lightweight and portable text editor based on the classic Notepad2. It offers enhanced features like extended syntax highlighting for numerous languages, Unicode support, and a tabbed interface, making it a superior replacement for the standard Windows Notepad for developers and power users alike.

Geany is a powerful yet lightweight text editor that bridges the gap between basic editors and full-fledged IDEs. It provides essential development environment features like syntax highlighting, code navigation, and a built-in terminal, making it suitable for a wide range of programming tasks.

gedit is a free and open-source text and code editor for the GNOME desktop environment. Known for its simplicity and clean interface, gedit provides essential features for both general text editing and basic code development, making it a popular choice for users seeking a straightforward and efficient tool.

NetBeans is a free and open-source Integrated Development Environment (IDE) specifically designed for enterprise-level Java development, supporting a wide array of other languages and technologies, including PHP, C++, JavaScript, HTML, and CSS. It provides comprehensive tools for coding, debugging, testing, and deploying applications.

Vim is an advanced, highly configurable text editor designed for efficiency, particularly favored by developers. Operating primarily in the terminal, it offers powerful editing capabilities through keyboard commands, syntax highlighting, and extensive plugin support, making it a cornerstone tool for programming and advanced text manipulation.