Looking for marketer for two side projects, for profit sharing

I have two products that I don't have time/interest to market. One is a text entry tool for people with vision problems. It is highly tuned for efficiency and flexibility. The other is a tool for organizing and searching photos. Again, it is very efficient and can handle a huge number of files better than Adobe Lightroom.

I am looking for someone who can market one or both products, where you would earn a percent of the revenue for sales that came from channels/promotions that you are responsible for. The percentage is negotiable, as is the mechanism used to track the sales that come from your efforts.