One of my favorite tools that I use for my personal and client work. 

Canva is a free-to-use online graphic design tool. Use it to create social media posts, presentations, posters, videos, logos and more.

Perfect for business cards.  I love the variety of options they have for pre designed business card that you can customize for yourself.  They also have options to create your own.

When you are first starting out and want to create newsletters, I recommend mailchimp's free version.  There are basic templates and as time progresses and your email list grows and you wantmore bells and whistles, you can do a paid version.

Freelancers Union
Freelancers Union is a nonprofit organization that serves independent workers across the U.S. They provide networking events, FREE coshare workspace, education, advocacy, and access to benefits, etc. They are based in Sunset Park, Brooklyn. Best of all, it is free to be a member.