Evernote is a digital workspace designed for taking notes, organizing them and archiving everything. They used this Free trial email sequence to introduce Evernote and its features.
This email sequence opens with an optin page where you can download Evernote. Followed by a set of emails where they walk you step by step through the process of understanding Evernote. In every email they drop a call for action to download their product.
You can read more about Evernote here: evernote.com