Butterfly Effect Official Movie Site: Official site which includes the movie trailer, pictures, wallpapers, and screensavers.
CIN3MA Moving Pictures: The Butterfly Effect: Review, rating,and pictures.
Gnomon Publishing: The Butterfly Effect: One-star review by Alex Rieneck - "...all the appeal of a major traffic jam on a hot, dry, windless day."
HARO Online: Haro review of the movie in which he talks about the plot and cast.
IMDb - Butterfly Effect, The: Includes plot and cast information.
Movie Forums - The Butterfly Effect: Review of the film by LordSlaytan in which he rates the film 2 1/2 stars out of five.
The Butterfly Effect: Includes a synopsis, cast and crew, media, and links.