The old gnome file manager Nautilus used to support split panes (I still use it in Fedora 19), but newer versions don't. So I use gnome commander, which is really, really ugly, but it works.
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"Giant pig hot air balloon crashes after tangling with a cowboy-shaped one"
Very well, here it is. Let me know if you get stuck on a level. Hint: avoid people. And animals. And plants. Oh, and the preferred lubricant is alcohol.
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"EPA plan offers all pain, no gain" – President, National Mining Association