A good alternative to Amazon Affiliates is the Target Affiliate Program. They are another big business, who sells a huge variety of product, so it’s very easy for bloggers to fit links easily into their content. The downside is that Target is a popular shopping place, so affiliates may miss out on potential commissions when people choose to shop in-store instead. Nonetheless, it is still a great affiliate program.
If you have a good idea for an app, and the skills to create it, then producing your own premium app can be profitable. However, with so many free apps available, it may be hard to convince people to pay. If you want to go down the premium app route, consider having a basic free version to encourage people to download the app in the first place. You can then provide the option of upgrading to a premium plan once users realize how useful the app is.