I have 2 companies in the professional photography space: http://bigfolio.com and http://aphotofolio.com. The first serves wedding and portrait photogs and the second high-end editorial, commercial, fashion. We provide website designs and a custom CMS for managing galleries. We get a setup fee (though that is going away soon) and monthly hosting. They aren't exactly equal but each is making in the low six figures per month.

On the wedding side we also have http://nextproof.com which is sort of a "shopify for wedding photos". It makes around $30k/month in subscription + transaction fees.

On the commercial photo side, we have http://editdrop.com which is a feedback/collaboration tool for photographers and their clients. It makes about $2k/month at the moment since we haven't done much marketing yet.

Overall, I'm bearish on the professional photo space so we are actively looking into other verticals and doing a lot of customer dev/research.

My wife and I also run http://cheergram.com in our spare time. Right now we are making a few hundred bucks a month in sales but we did almost $3k in Instagram Christmas cards last year between thanksgiving and Christmas. I'm hoping we can top that this holiday season.