PIDA is an IDE (integrated development environment). PIDA is different from other IDEs in that it will use the tools you already have available rather than attempting to reinvent each one. PIDA is written in Python with the PyGTK toolkit, and although is designed to be used to program in any language, PIDA has fancy Python IDE features.
cssed is a CSS stylesheet editor for Web developers. It lets you write your own (XML based) CSS definition files and then insert CSS properties and values in the stylesheet, just by clicking in a tree view. You can also enable autocompletion in a document basis, so the CSS properties and values are
... [More] selected from pop menus in the editor to increase speed. While static CSS values are inserted directly, complex CSS values are dialog driven. The CSS definition file included in the release fully supports CSS2. [Less]