Listingninja.com makes using craigslist easier.
Landlords, recruiters, and consultants using craigslist to find renters, hires, and clients receive multiple emails a day from multiple people, possibly in response to multiple listings. Often these emails are mixed in the inbox with normal work emails, personal emails, newsletters, etc. and can become hard to find hours and days after the response. ListningNinja keeps those emails neatly organized by listing, user, and date so no hunting through your old emails is required to get that key bit of info you need.