Hubspot and MailChimp
Used Eloqua and loved it!
Mail Chimp.
Constant Contact.
Exact Target.
Email Labs.
Now on a mission to convert a bunch of marketers from Marketing Cloud and Pardot to Marketo lovers. I love how powerful Marketo is. If the interface can be a bit sexier, that'll make my preaching much easier.
Started off in Mailchimp. Used a little bit of Constant Contact before shifting to Marketo in my current role.
Miss the simplicity and quality of the email editors in Mailchimp and CC, but the additional automation functionality in Marketo for emails alone is amazing - let alone everything else we use automation for.
MailChimp / Constant Contact / AWeber
Infusionsoft (Former Admin of Infusionsoft's Infusionsoft)
Marketo
MailChimp.
It's quite a change, though.
I used Pardot for 2 years. I was so excited when we moved to Marketo and I was introduced to program templates and tokens. What a game-changer!