Just to confirm, you are looking for an electronic DC load (not a Power Supply), correct?
If you are looking for an electronic DC load there are several manufactures and models to choose from including Itech, Rigol, BK Precision, and others. There is a line of thought that a number of the entry/midrange models are descendants of a particular design/designer. With some good searching you might find such story.
Around here (EEV Land) one of the more popular manufacturers has been Maynuo. They make a few models that are neither the least expensive or most expensive and they tend to have pretty good but probably not super great front panel user interfaces, and they have an option for a computer interface. Their display lets you see how your settings and DUT result in Volts, Amps, Ohms, and Watts - so it’s pretty useful if you need a DC load. Once you become familiar with their front panel UI it will allow you to make changes to settings pretty easily and quickly.
Just recently in another thread near yours a discussion has started about a Korad DC load. It seems to be less expensive than the Maynuo models but with less features (no numeric key pad?) - it might be worth a look see.
If you can frame more specific questions you will probably get more replies from people who use DC loads.