A Windows WPF app to do a quick API request search for records (Contacts, Accounts) in Dynamics online CRM. Because got annoyed by slow Dynamics web page loading times.
Working with Microsoft products Dynamics 365 for Sales + Power Apps + PowerBI. Started at 0 knowledge and 0 customers 7 years ago. Have few customers, am fully booked months ahead, quality over money, that's how I do it atm. Currently going at 90EUR/h (103USD/h). Each time I get a new major client my rate goes up 10EUR/h. That's not even a pricing strategy or anything, just how I do it, like a bonus to myself for being a cool dude.