Geany

Geany is a light text editor with a user interface based on Scintilla and GTK graphic libraries, which has the basic features of an Integrated Development Environment. It supports a wide range of programming languages, giving you an extensive list of options to work with, from C to Python, including C++, Java, JavaScript, HTML, or Vala, among other possibilities.

Among the many features offered by Geany are autocomplete, markers, syntax highlighting, code-pasting, automatic XML and HTML tag closing, suggestions, symbol lists, embedded device emulator, code navigation, or support for .4 plugins, among many others.

Another advantage of this tool is that it is multiplatform, meaning that you can work on your projects on Mac, Windows, or Linux. Easily save your work on an external storage system and move it to another device to keep working without any change or alteration.

In addition to the above, it's worth mentioning the plugin system that developers can use to add new functions or improve those that already exist easily. This means that users can enjoy the best possible plugins that help them work more comfortably. Geany is, in short, a great text editor that you can get much out of.