Ukit is a relatively new website builder, it comes from Russia and it puts up a decent fight against the established leaders like Wix, Squarespace and Weebly.
There are over 250 templates available to choose from, but most of them look alike and the best ones can only be used on the Premium+ plan ($8 / month)
Another shortcoming on the templates front, not all of them have the same functionality (widgets) and you kind of have to guess what works where.
There are a few translations available for the admin area (English, Portuguese, Romanian and Russian).
There is no membership functionality but a nice surprise is the unlimited SMS notifications for contact form entries, available for all the paid plans.
Speaking of which, there is not free plan available, only a 14 days free trial. After that you'll need to choose a paid plan, starting at $4 / month, which is very competitive with no ads and unlimited storage.
For $9.60 per month you get access to the Ecommerce functionality, which keep getting better, lately they've added in-house payment processing, which means visitors don't leave the site when they make a purchase.
One other nice feature is the ability to undo/redo almost any access and more importantly, you can save the whole website instance (10 backups available), which means you can restore the whole website in a previous state.
There is also a service where they build a website or landing page for $100, in 10 days. I wouldn't expect anything spectacular, but it could be a good starting point.