Geany is a small and lightweight Integrated Development Environment. It was developed to provide a small and fast IDE, which has only a few dependencies from other packages. Another goal was to be as independent as possible from a special Desktop Environment like KDE or GNOME - Geany only requires the GTK2 runtime libraries.

Some basic features of Geany:

Syntax highlighting

Code folding

Symbol name auto-completion

Construct completion/snippets

Auto-closing of XML and HTML tags

Call tips

Many supported filetypes including C, Java, PHP, HTML, Python, Perl, Pascal

Symbol lists

Code navigation

Build system to compile and execute your code

Simple project management

Plugin interface

Platform:Cross Plaform;         Licesne: GNU General Public Licence

Reference:https://www.geany.org/Main/About