Fiverr- Fiverr is a site to do work for $5 with the possibility of earning more. Its great for getting your name out there, gaining experience, and designing a bigger portfolio. I have had a few jobs on here so far some paid more than others.
Upwork- is a better website to get paid more but has higher expectations so having a good portfolio is key. I have had a few jobs on here but this site is a lot more difficult to get jobs because the clients have higher expectations.
99 Designs- Is where a bunch of designers will submit designs based on the client specifications. The winner will get a sum of money.