3. Mutual Fund Investments
Fidelity also has zero-fee funds that allow you to have zero fees and invest with their index funds. Index Funds are an easy way to start investing with little money. These can be Vanguard Index Funds as well.
5. Employee Sponsored Retirement Plan
401k plans can allow you to start investing with little money. You enroll, and the money comes out of your check. A lot of companies even match it. That's Free money.