Kate

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Kate is a powerful text editor that can open multiple files simultaneously.

With a built-in terminal, syntax highlighting, and tabbed sidebar, it performs as a lightweight but capable development environment. Kate's many tools, plugins, and scripts make it highly customizable.

Kate's features include:

* Multiple saved sessions, each with numerous files
* Scriptable syntax highlighting, indentation, and code-folding
* Configurable templates and text snippets
* Symbol viewers for C, C++, and Python
* XML completion and validation

Similar applications: 
Gedit, VIM, VI, Notepad, Nano, Pico, Emacs