KDevelop is a free integrated development environment (IDE). There is source code navigation and debugging for projects in different programming languages, work with different build and version control systems, and all this is implemented on a modular basis.

KDevelop can analyze code in C, C++ and Javascript/QML, and there are also external modules for PHP and Python.

Geany is a small and lightweight integrated development environment.

The basic features of Geany are:
- syntax highlighting
- code completion
- auto completion of constructs like if, for and while, XML and HTML
- call tips
- many supported filetypes like C, Java, PHP, HTML, Python, Perl, Pascal
- symbol lists
- embedded terminal emulation