Anjuta is an Integrated Development Environment (IDE) for C and C++.

Bluefish is a powerful editor for experienced web designers and programmers.

Eclipse is an IDE for Java and other programming languages. It forms the basis for closed-source programs such as JBuilder.

Eric is a fully featured Python and Ruby IDE.

Geany is a general-purpose IDE which can handle manydifferent programming and markup languages.

IDLE is the Python IDE built with the Tkinter GUI toolkit.

KDevelop is a IDE for KDE which supports many programming languages.

MonoDevelop is an IDE for writing Mono/.NET applications in C# and other languages.

NetBeans is a Java IDE that features support for CVS and a form builder.

Quanta is a powerful IDE for web development and features support for DocBook editing.

Bazaar-NG is a decentralised version control system used for Ubuntu development.

CVS is an advanced version control system used by many open-source projects.

Subversion (SVN) is a powerful version control system intended as a replacement for CVS.

Glade is a user interface designer for building GNOME and GTK applications.