Optin Monster - Cart Abandonment Email Sequence
OptinMonster provides smart lead capture forms to convert more visitors into subscribers. In order to decrease cart drop off, they used this Cart Abandonment email sequence.
OptinMonster is supersmart by capturing the email of their visitors as soon as they type it. This allows them to email the abandoned customer even if they don't have an account yet. This has huge potential to increase sales.
You can read more about OptinMonster here: http://optinmonster.com/