I have websites those have developed using several front end technologies like CSS, HTML, Jquery etc. But those have not back end. I want a way to add content to websites without editing codes. That means I want a CMS for the back end. I tried WordPress as a back end in my one project. In that case, I have to use several WordPress plugins to develop my website instead of Jquery plugins. Finally, that site became very slow. That load several unwanted Js and CSS files and much more. Basically, I want to create unique UI for the websites with pre-built CMS. If anyone interested with this please let me know what is the best option I have to do.