All you need is a fairly recent browser (Internet Explorer 6 or 7, Firefox, Safari or Opera) and an Internet connection to use Ponyfish. Note that you must have JavaScript and cookies enabled in your browser.
You will also need an RSS reader to read the feeds created with Ponyfish.
Not to be confused with a seahorse, a ponyfish is a family of fish in the Perciformes order. There are many types of ponyfish, but the most famous one is the Crayon Ponyfish, of which the RSS Ponyfish is a close relative.
Ponyfish is the creation of Recursive Function, LLC, a small software development company based in Indiana, USA. You might be interested in FormSpring, another Recursive Function product that provides an easy way for people to build and process online forms.