Geany is a text editor using the GTK2 toolkit with basic features of an integrated development environment. It was developed to provide a small and fast IDE, which has only a few dependencies from other packages. It supports many filetypes and has some nice features. For more details see Here.
To install Geany on Raspberry Pi, enter the command:
$ sudo apt-get install geany
Once installed, you can run Geany in Start > Programming > Geany
or enter the command: