If you have a background in a specific field, you may find there is a demand for writing industry papers in your area of expertise. For example, there are often adverts for doctors, lawyers, nutritionists, and business experts from particular niches, to write white papers on different subject areas. These are well paid jobs that you will need to stake your reputation on, but that can often be worked on from the comfort of your own home.
Merch by Amazon is another service offered by Amazon that will enable you to make money online without any initial outlay. To get started you need to create an account with Merch by Amazon. Then simply design some T-shirt logos or slogans, and upload them to your Merch account. You will need to choose a T-shirt type, color, and price, and Amazon will create product pages for each T-shirt. When someone makes a purchase, Amazon takes care of production and shipping. And you are paid a royalty for your design.