Is there an editor, preferable with GTK support, no JAVA (OmegaT looks ugly, or am I wrong?), to translate texts like in Swordfish under linux? Or is there a simple editor solution, like a plugin for gedit, which gives me each phrase side by side (e.g. left: original, right: my translation).

I am imagine something awesome like the meld editor, see dummy pictures as example below. Anybody?