Eggy is an IDE that includes syntax highlighting, template features, options for compiling and running your code, auto completion, and more. Eggy's distinguishing feature is its support for group projects, which allows users from around the world to connect to each other and work together on a project and see live changes being made. Users can communicate through the chat mechanism, add, remove, and rename files to and from the project, sync files, and exploit other useful features. Eggy supports many languages, including C++, Python, Perl, Ruby, shell scripting, and others.
Monster script (or just Monster) is an advanced scripting language made specifically for game development. The language features many new and powerful features, while still aiming first and foremost at increasing productivity and actual usability. The language is especially designed to facilitate game modding and user-generated content and scripts. It is highly object oriented, type safe, bytecode-compiled, and is easily embedded into existing game engines.
COMPO is a graphical design application for Ubuntu/Debian. It allows you to design and position graphical and text objects on defined areas of a larger page. You can use it to make business cards, labels, folded fliers, etc. Different compositions can be placed on different target areas of the same page, and non-grid layouts are supported.