I've been using Interspire (http://www.interspire.com/emailmarketer/) for a long time, but their lack of innovation in their features makes me want to see if there are more software that can do the same job that Interspire.

So far, I have found these:

None of them are responsive or have features for social networks. I really liked Active Monitor, but their onsite solution is not longer available.

What other options do I have? I have around 20 clients, but they are moving towards services like Mailchimp, so I need to act fast.

Thanks in advance for any help about this.