Geany - Small and lightweight Integrated Development Environment

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
Geany is known to run under Linux, FreeBSD, NetBSD, OpenBSD, MacOS X, AIX v5.3, Solaris Express and Windows. More generally, it should run on every platform, which is supported by the GTK libraries. Only the Windows port of Geany is missing some features.
The code is licensed under the terms of the GNU General Public Licence.
Install Geany in ubuntu
Open the terminal and run the following commands
sudo add-apt-repository ppa:geany-dev/ppa
sudo apt-get update
sudo apt-get install geany geany-plugins
Screenshot

Sourcecode:here