I like http://basecamp.com (I love the artwork, to be honest), and lately I have found http://getbeagle.co - though its usability could be discussed, I like its aesthetic.
I don't understand why do so many people like basecamp landing pages, to me it's just overflown with plain text, I don't know it's just me or not but the more text content I see on a landing page - the less desire I have to read it.