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This is "yes, it's a program", a page I use to display and store my esoteric language designs and the programs I've written in my own languages and those of others. There are also interpreters (mainly in Python and C) and other software related to esolanguages.
For more languages, programs, and related phenomena, see Esowiki (which also has content I've done but haven't placed anywhere here). My user page there is here (hah, text with links can sound pretty strange).