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- DS9 7.2 callable from the command line (might work on earlier versions). You can install manually or with MacPorts.
- XPA for allowing commands to be given to DS9 from the command line. If you are on a mac and have trouble installing XPA manually, try using Fink or MacPorts to install it. After installing make sure the directory for xpaset, xpaget, and xpans is in your "Path" (as defined in .bash_profile or .cshrc), or else DS9 and XPA cannot interact.
- Python 2.6 or 2.7 (untested on other versions). Easiest to install with pip or easy-install.
- Scipy. Easiest to install with pip or easy-install.
- Matplotlib. Easiest to install with pip or easy-install.
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