I love MailChimp for its ease of use. It’s a great starter for email automation.
HubSpot is FANTASTIC for starting out in lead generation through content. The only thing I don’t like about it is their email marketing/automation/workflow tool. We almost always couple it with Mailchimp.
We use Google Drive when collaborating with clients and it works really well. The only thing I don’t like is I can’t access it offline.
I love Dropbox for the very reason that I can access it offline (and we use it exclusively internally). I can access it from the plane at 30,000 feet without WiFi.
We’ve used both Basecamp and Asana. We’ve drifted more toward Basecamp because the user experience is better, most clients understand it, and because you can check things off your list!
We’re pretty much just using Slack for internal communications, but do quite a bit of project management through it. I have a channel called “Docs for Gini to Review” and everything goes in there so it’s easy for me to track.
I personally use Hootsuite, which is easy to use to schedule social media updates. My colleagues use Buffer and Sprout Social.