Eric4

Eric is a feature-filled Python and Ruby editor, as well as an IDE. Written in Python, it is based on the Cross-platform Qt GUI toolkit, which integrates the highly flexible Scintilla editor control. The project is designed with a dual-purpose - to be both an everyday quick and dirty editor, as well as a professional project management tool, which can integrate many advanced features that Python offers for the professional coder.

With a user-friendly interface, Eric provides easy access to all of its functionalities. Eric's configuration wizard can guide you through the initial setup process, and the Project Browser allows for easy access to files and directories, making the process of navigating through the project files easier.

The feature set of Eric is vast and boasts various functionalities and features such as syntax highlighting, code completion, and code folding. Eric is also equipped with a debug facility with integrated debugging support, making it easier to debug code blocks. The editor's frontend provides support for Version Control Systems like Git, Mercurial, and Subversion, enabling you to manage your code bases easily.

In conclusion, Eric is a fully-fledged IDE with a plethora of features that will satisfy the needs of professional coders. The integration of Scintilla and the Qt GUI toolkit adds to its user-friendliness, making it easy to use. Eric's ability to be both an everyday editor and professional project management tool makes it versatile and should be a preferred choice for coders.