These are a bunch of things that you didn't need until I listed them.
FreeMind A mind mapping program which I find very useful.
Scrivener This is the all-in-one planning, research, drafting, writing, and publishing tool you've probably heard a lot about.
CoSchedule CoSchedule is an editorial calendar, task manager, and social media planner for WordPress.
Evernote I store my brain in Evernote. This is an amazing notebook tool for research. Another is ...
Google Keep Fast, easy, light and backed up on your Google Cloud. Never loose any note again.
iA Writer Minimalist writing app for iPad. Using Dropbox, you can sync writing in iAWriter between your devices and Scrivener.
TweetDeck MarketingTweetDeck is the easiest way to keep track of your social accounts without needing to log in every time.
Buffer Buffer is a lifesaver. It posts automatically, using a queue-like list of your scheduled updates.
AWeber It's the #1 mailing list provider, and I use it for all of my newsletters.
MailChimp "Sexier" than AWeber, because there is a Chimp, easy-to-use, and free (up to a point), it's only #2 because of feature limitations.
MindMup is a mind mapping tool, like FreeMind, but different. It's super easy to use, but limited.
Feedly RSS reader to keep up with all of your blog reading.
Skype Skype is my phone -- no, seriously, it is what I use for most of my communications That and ...