WYSIWYG Web Builder
A say this as a warning anyone thinking of spending money on this program, it's definitely the worst website builder I've ever come across. (And the guy who created the program is a total a-hole.) It uses this bizarre process of hiding/showing elements on the pages depending on the breakpoint, and it's support for things as simple as custom CSS is horrible.
The interface is sort of a throwback to an old version of Microsoft Office. Case-in-point... the fonts sizes are predetermined by the program, and are in POINTS, and cannot be changed to anything else (although the program itself converts the points to pixels in the actual HTML it produces.) For example, the font size menu is a drop-down where you can choose from things like 8, 10, 12, etc... up to sizes like 24, 28, 36, 48. But if you want to choose 40, you can't. And since it uses points instead of pixels (like pretty much every other web builder in existence) it's kind of a crapshoot to get the size you want unless you keep a chart handy, or have memorized that 12 points = 16px, 13 points = 18px, that sort of thing. I must have argued back and forth with the owner over a dozen emails trying to convince him of the wisdom of letting people choose what unit they wanted for their text (points, pixels, ems, rems, etc) but he would not budge. His justification was his large existing user base that never complained about points.
Basically every suggestion I made to him to try and modernize the program, or do things according to best practices fell on deaf ears. He strikes me as someone whose entire sense of self-esteem is tied up in this software, and he feel personally persecuted when anyone suggests there might be things wrong with it. I haven't touched the program since version 12 (I think it's up to 15 now) so who knows if he finally "saw the light" on anything we discussed, but it's basically an old-style, static site builder from the early 2000s that they guy has shoehorned responsiveness into, whilst giving the user only limited control over the actual code.
Avoid at all costs!