Click Bank
Clickbank is probably the leader in selling electronics goods such as software utilities and eBooks. Electronic goods from Clickbank often have a high commission rate — 40% and more is not unusual, even for $97 books so you can easily make around $30 – $45 per sale. Easy to enroll and lots of products.
The only downside is that they don’t have a very good search engine to search for particular products. You often have to rely on third party search engines like CBMall for that feature. It’s free to search, though.