I created a few nice looking websites with the free version of RocketCake - it it very easy to use and simply gets out of the way. It has all the options I need and you can create complicated stuff with mostly a few clicks.
Classy - Expressive, flexible, and powerful stylesheets for native iOS apps
Webflow - Build dynamic, responsive websites in your browser. Launch with a click. Or export your squeaky-clean code to host wherever you'd like. Discover the professional website builder made for designers.
Little Green Light - Illuminating Data. Advancing Nonprofits.
WiX - Create a free website with Wix.com. Customize with Wix' website builder, no coding skills needed. Choose a design, begin customizing and be online today
Agilon One - Agilon One is a Nonprofit CRM software solution that connects and gathers information on constituents.
Froont - Design responsive landing pages, publications, microsites without code