The Sarcasterizer
It's "common knowledge" that the Web has run "dangerously" low on insincerity. Everywhere you look, pages are earnest, heartfelt, and "authentic," and frankly we can't "stand" it.
So we've brought back a "beloved" "classic." Type in the address of nearly any page on the Web and the Sarcasterizer will "lovingly" restore the detached irony it was "obviously" meant to have. Click any link on the result and the "magic" follows you there.
"Suggestions": a random Wikipedia article, Hacker News.