Edit: Due to the fact that this article is old, the installation instructions may not work anymore. In order to successfully install the latest version of Geany, please access the geany tag and open the latest article (the one on top).
As you may know, Geany is an open-source, lightweight and fast text editor, providing the main features of an IDE, including Syntax highlighting, code folding, support for popular programming languages, automatic indentations, and automatic closing of XML and HTML tags. Also, its usability can be extended via plugins.
The latest version available is Geany 1.25, which brings support for GTK+3, got support for CoffeeScript, JSON and Zephir coding languages, display dialogs directly in the text editor and the search feature has received support for regular expressions (regex). For more information, see the commit history on Git.
Up to date Geany packages are available via some third party PPA, so installing the software on Ubuntu systems is easy. Just add the PPA to your system, update the local repository index and install the geany package:
$ sudo add-apt-repository ppa:geany-dev/ppa
$ sudo apt-get update
$ sudo apt-get install geany
Optional, to remove geany, do:
$ sudo apt-get remove geany
The installation instructions should work on Ubuntu 15.04 Vivid Vervet, Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr, Ubuntu 12.04 Precise Pangolin and derivative systems like Linux Mint 17.2 Rafaela, Linux Mint 17.1 Rebecca, Linux 17 Qiana, Linux Mint 13 Maya, Pinguy OS 14.04, Elementary OS 0.3 Freya, Elementary OS 0.2 Luna, Deepin 2014, Peppermint 6, Peppermint 5, LXLE 14.04 and Linux Lite 2.