Promote business2business services to other entrepreneurs in return for a commission. This can include phone number suppliers, business card creators, stock photography agencies, web hosts and others.
As a dreamstime affiliate you can refer customers who download pics, or you can refer photographers and get a cut of their revenue.
Udemy is a well-known platform that allows anybody to take online courses provided by instructors. You can profit from promoting the service by joining their affiliate program.
Callhippo is a virtual phone system provider for businesses. They have an affiliate program you can join in order to promote the service and receive commissions.
Refer new members to the Funding Circle investment service in the UK and receive a bonus for you and the person who you refer.
Wix, the website builder, has an affiliate program allowing you to refer new customers and receive a commission.
Wrike is an online business productivity app for better teamwork and project management.