AdamCadre.ac: Games - Author's website. Download I-0 or play it online using Java. - http://adamcadre.ac/if.html#I-0
Baf's Guide to the IF Archive: I-0 - Rated 4/5 by Carl Muckenhoupt. "Any particular session will be quite short, but the game is highly replayable due to its many alternate paths and solutions." Links to play online, download, and source code. - http://www.wurb.com/if/game/114