I would also love some recommendations of these other apps you are all referring to.
Well Jonathan the other apps for me are the bee's knee's (including the clutter ) especially "Foundation Framer" not used Bootstrap Builder because Foundation Framer satisfies all of my needs (including the clutter)so wouldn't know about that one) they allow for the design & development of a site visually, so you can see whats going on as you develop the site,, images are imported to a resources folder and show up instantly once you select the image,,, (which allows you to play around with sizes ad all sort of other stuff.
you can make the use of nested containers, which along with sub-grids can take the design to all sorts of new levels especially when using the almighty "flexing" (but too easy to rely on this as a crutch in some cases) there are a wide variety of components that come with FF (Ingers clutter) but as I said don't need to use them if not needed,, but for example drop down menu (either hover or click) is a breeze to add,, responsive menu also,,,,, modal widows either full or simple reveals,,,, (perfect for making slideshows similar to light box, but without all the messing about with 3rd party html imports etc all at your fingertips.
The only drawback with FF for a lot of us old timers is it works from mobile up (not desktop down) which takes a bit of getting used to,,,,, but I will tell you what,, once you get that AAAAAH orgasmic moment for working that way,,, you will wonder how you managed before for all those years.
Responsive Site Designer (RSD) is also a great visual App for design & development,,, it has the advantage of working Desktop down,, so it's familiar way for those stick in the muds,,,, doesn't yet have all the bells & whistles as Foundation Framer) (although there are rumors that it will soon have some) but it is still a great thing for creating sites that you can see working as you develop them.
Bootstrap Builder I don't need and probably never will, so can't really comment,, someone else would have to chip in for that app.
Having said all of that,,, your fishing thingy has got some good stuff going on,, and will be a nice looking site (once those couple of issues are sorted)
Have a great day everybody wherever in the world you are,,, I'm off to bed now 2:00am been a long day