We integrate natively with GMail, IMAP, and Exchange Emails as well as Gcal and Exchange Calendars. We also natively sync with MailChimp and as of next week, Evernote.
Since we integrate with Zapier, we can do light push/pulls from their 300+ services which you can find here - https://zapier.com/zapbook/
Since we integrate with Zapier, we can do light push/pulls from their 300+ services which you can find here - https://zapier.com/zapbook/